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*Corresponding author: [email protected] T he Sultanate of Oman is located in the Southeastern corner of the Arabian Peninsula. It has a coastal line extending almost 1700 km from the Strait of Hormuz in the north to the borders of Yemen, overlooking three seas; the Arabian Gulf, Gulf of Oman, and the Arabian Sea. e country borders Saudi Arabia and the UAE in the west, Yemen in the south, the Strait of Hormuz in the north, and the Arabian Sea in the east. ere are a number of scattered Omani islands in the Arabian Sea; the most important are Masirah and Al Halaniyat. e total area of Oman is approximately 309 500 km 2 and it is the second largest country in the Arabian Peninsula. Oman is composed of varying topographic areas consisting of plains, wadis (dry river beds), and mountains. e most important area is the plain overlooking the Gulf of Oman and the Arabian Sea with an area of about 3% of the total area. e mountain ranges occupy almost 15% of the total land of Oman and are inhabited by about 5% of the population. e remaining area is mainly sand, wadis, and desert (about 82% of the total area). e climate differs from one area to another; it is hot and humid in the coastal areas in summer, hot and dry in the interior with the exception of higher mountains and Dhofar governorate, which enjoy a moderate climate throughout the year. Oman is administratively divided into 11 governorates with 62 Wilayats. ese are Muscat, Dhofar, Musandam, A’Dakhiliyah, Al Buraymi, A’Sharqiyah South and North, Al Batinah South and North, A’Dhahirah, and Al Wasta [Figure 1]. Population structure The estimated mid-year population in1996 was 2 135 853 of which 1 593 769 were Omanis and 542 084 were Non-Omanis. e Omani population shows a sex ratio of 963 females per 1000 males. About 16.0% of the population is under-5 years and 45.0% is under-15 years. Only 3.0% of the total Omani population is above the age of 65 years. While, the estimated mid-year population in 2015 was 4 159 102 of which 2 344 946 were Omanis and 1 814 156 were Non-Omanis. e Omani population showed a sex ratio of 979 females per 1000 males. About 14.9% of the population were under-5 years and 35.7% were under-15 years. e population above 65 years increased to 4.3% [Figure 2]. Oman national cancer registry e Oman National Cancer Registry was established in 1985 as a hospital-based registry. Only cases treated in tertiary hospitals were registered. In 1996, with the establishment of the department of Non-Communicable Diseases Surveillance and supplement Oman Medical Journal [2019], Vol. 34, No. 4: 361-387 Twenty-year Trends of Cancer Incidence in Omanis, 1996–2015 Najla A. Al-Lawati 1 , Bassim J. Al-Bahrani 2 , Shadha S. Al-Raisi 1 and Jawad A. Al-Lawati 1 * 1 Directorate General of Primary Health Care, Ministry of Health, Muscat, Oman 2 National Oncology Centre, Royal Hospital, Muscat, Oman MUSCAT Al BURAYMI MUSANDAM AL BATINAH A’DHAHIRAH A’ DAKHILIYAH A’ SHARQIYAH AL WASTA DHOFAR Figure 1: Diagrammatic map of the Sultanate of Oman.
Transcript

*Corresponding author: [email protected]

The Sultanate of Oman is located in the Southeastern corner of the Arabian Peninsula. It has a coastal line extending almost 1700 km from the Strait of

Hormuz in the north to the borders of Yemen, overlooking three seas; the Arabian Gulf, Gulf of Oman, and the Arabian Sea. The country borders Saudi Arabia and the UAE in the west, Yemen in the south, the Strait of Hormuz in the north, and the Arabian Sea in the east. There are a number of scattered Omani islands in the Arabian Sea; the most important are Masirah and Al Halaniyat.

The total area of Oman is approximately 309 500 km2 and it is the second largest country in the Arabian Peninsula. Oman is composed of varying topographic areas consisting of plains, wadis (dry river beds), and mountains. The most important area is the plain overlooking the Gulf of Oman and the Arabian Sea with an area of about 3% of the total area. The mountain ranges occupy almost 15% of the total land of Oman and are inhabited by about 5% of the population. The remaining area is mainly sand, wadis, and desert (about 82% of the total area). The climate differs from one area to another; it is hot and humid in the coastal areas in summer, hot and dry in the interior with the exception of higher mountains and Dhofar governorate, which enjoy a moderate climate throughout the year.

Oman is administratively divided into 11 governorates with 62 Wilayats. These are Muscat, Dhofar, Musandam, A’Dakhiliyah, Al Buraymi, A’Sharqiyah South and North, Al Batinah South and North, A’Dhahirah, and Al Wasta [Figure 1].

Population structureThe estimated mid-year population in1996 was 2 135 853 of which 1 593 769 were Omanis and 542 084 were Non-Omanis. The Omani population shows a sex ratio of 963 females per 1000 males. About 16.0% of the population is under-5 years

and 45.0% is under-15 years. Only 3.0% of the total Omani population is above the age of 65 years. While, the estimated mid-year population in 2015 was 4 159 102 of which 2 344 946 were Omanis and 1 814 156 were Non-Omanis. The Omani population showed a sex ratio of 979 females per 1000 males. About 14.9% of the population were under-5 years and 35.7% were under-15 years. The population above 65 years increased to 4.3% [Figure 2].

Oman national cancer registryThe Oman National Cancer Registry was established in 1985 as a hospital-based registry. Only cases treated in tertiary hospitals were registered. In 1996, with the establishment of the department of Non-Communicable Diseases Surveillance and

supplement Oman Medical Journal [2019], Vol. 34, No. 4: 361-387

Twenty-year Trends of Cancer Incidence in Omanis, 1996–2015Najla A. Al-Lawati 1, Bassim J. Al-Bahrani2, Shadha S. Al-Raisi1 and Jawad A. Al-Lawati1*1Directorate General of Primary Health Care, Ministry of Health, Muscat, Oman2National Oncology Centre, Royal Hospital, Muscat, Oman

MUSCAT

Al BURAYMI

MUSANDAM

AL BATINAH

A’DHAHIRAH

A’ DAKHILIYAH A’ SHARQIYAH

AL WASTA

DHOFAR

Figure 1: Diagrammatic map of the Sultanate of Oman.

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Control, the cancer registry was transferred and started functioning under the Directorate General of Primary Health Care. New cancer notification forms were developed and distributed to all regional hospitals and institutions. In 2000, the registration form was simplified, printed, and distributed to all institutions that could potentially report cancer cases. Three trained cancer registrars are responsible for data collection, coding, and data entry of all reported cases.

M ET H O D S

1. Data collectiona) Active collectionActive collection involves the registry personnel visiting different sources and abstracting data on cancer registry forms. Being the largest tertiary center for diagnosis and treatment of cancer, registrars visit the Royal Hospital twice a week and abstract data on the notification forms. Similarly, other tertiary hospitals like Khoula Hospital and Al-Nahdha Hospital are visited once a month.

Data on patients undergoing chemotherapy and radiotherapy treatments are also collected from the National Oncology Centre which was established

within the Royal Hospital in November 2004. Data of patients diagnosed with cancer abroad are traced through oncology out-patient registers at the Royal Hospital, and subsequently, data are extracted from their case notes. Detailed list of patients sent abroad for cancer treatment through the Ministry of Health system are obtained from the department of Treatment Abroad.

b) Passive reportingCancer notification was made mandatory in 2001 through a Ministerial Decision (4/2001). When a case of cancer is diagnosed, the attending physician of the relevant specialty or the medical records department at the regional hospital completes the notification forms and sends them to the registry. Other institutions like the Armed Forces Hospital and Sultan Qaboos University Hospital have similar passive reporting. In 2017, the above Ministerial Decision was updated (222/2017) to include all health (Civil or Military) institutions in Oman including private hospitals. These institutions are frequently visited by the cancer registrars for data extraction of patients diagnosed in them.

2. Data-coding, entry, and validity checksUntil 2001, all cancer cases were coded using

811 790 - Males (%) 782 010 - Females (%)0.0 1.01.0 2.02.0 3.03.0 4.04.0 5.05.0

0

5

30

10

15

20

25

35

40

45

50

55

60

65

70

75

50000 100000 150000 200000

1 184 430- Males (%) 1 160 516 - Females (%)1.01.0 2.02.0 3.03.0 4.04.0 5.05.0 0.0

0

5

30

10

15

20

25

35

40

45

50

55

60

65

70

75

Figure 2: Population pyramid, Oman, 1996 and 2015.

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International Classification of Diseases for Oncology (ICDO-2) with topography ‘C’ and morphology ‘M’ codes. Initially, data were entered using CanReg3 software, (International Agency for Research on Cancer (IARC), lyon, France). Subsequently, CanReg4 software and ICDO-3 were used in 2003. Duplicate entries were checked by this software to avoid the same case being registered more than once. In 2016, the registry software was upgraded to CanReg5 (version 00.40).1 For this report, we used CanReg5 (version 00.42). Validity checks were performed for consistency between site/histology, gender/site, and age/site/histology combinations using the same version.

3. Completeness of data reportingData are obtained from all hospitals with histopathology/cytology and hematology laboratories (Royal, Al-Nahdha, Khoula, Sultan Qaboos University, and Sohar Hospitals) from copies of patients' reports diagnosed with cancer to the registry. Since the mid of 2001, Sultan Qaboos University and Armed Forces Hospitals histopathology laboratories have also started sending reports.

Since the establishment of the new National Oncology Centre, chemotherapy and radiotherapy weekly logs are included in data collection of all patients attending these two modalities of treatments. Monthly hospital admission and discharge lists sent from all tertiary and regional hospitals to the Registry office to extract data of patients admitted for or discharged with a diagnosis of cancer and patients status are updated in the Registry (alive/dead).

A list of all cancer patients attending for chemotherapy sessions in all tertiary hospitals is also obtained. Details of missing data are sought from all of the above sources so that the registry can be updated.

4. Data analysisThe analysis below is limited to Omani nationals in the ONCR database. Non-Omanis working in Oman represent a skewed population from a wide range countries from all over the world, making determination of denominator for the calculation of incidence rates among them a complex exercise.

The data was first checked for consistency and validity using CanReg5 (version 00.42, build1566 (IARC 2008).1 Frequency distribution and incidence tables were generated for Omani subjects, using this

software. Data for individual cancers were then exported to CSV format to Stata software (version 14.2, Stata Corporation, TX, USA) for analysis of incidence by region, gender and morphology, and topography. Bar diagrams and graphs are generated using Excel version 2013 (Microsoft Corporation).

The average annual incidence and crude rates for the entire 20 years period were generated using CanReg5. The total average incidence and crude rates were calculated manually using Excel. Average of mid-year population of the years 2005 and 2006 were used to estimate crude rates and age-standardized rates were calculated using the World Standard Population of Segi.2

Population denominators used for the calculations of incidence rates (by 5-year age group, gender, and region) were obtained from the Ministry of Health’s Annual Health Reports.3

5. Age-standardized rate (ASR)Age-standardized rates (ASRs) were obtained using the World Standard Population of Segi2 to adjust the crude incidence rates (CRs) and to remove the confounding effect of age [Table 1]. These rates could be used for comparison purposes with other rates where the same Segi population was used such as the World Health Organization’s agency, IARC, in its periodic publication Cancer Incidence in Five Continents.4

Table 1: Age structure of the World Standard Population of Segi.2

Age structure Population

0-4 12 0005-9 10 00010-14 900015-19 900020-24 800025-29 800030-34 600035-39 600040-44 600045-49 600050-54 500055-59 400060-64 400065-69 300070-74 200075+ 2000Total 100 000

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Comparison between the cancer incidence in 1996 and 2015In 1996, the total registered cases among Omanis were 787 (445 males and 342 females), and the CR for all cancer among Omanis was 49.4 per 100 000 (54.8 per 100 000 for males and 43.7 per 100 000 for females). The ASR was 95.0 per 100 000 (106.1 per 100 000 for males and 82.8 per 100 000 for females). While in 2015, the total registered cases among Omanis were 1632 (760 males and 872 females) and the CR for all cancer among Omanis was 69.7 per 100 000 (64.2 per 100 000 for males and 75.1 per 100 000 for females). The ASR was 105.0 per

100 000 (101.0 per 100 000 for males and 109.0 per 100 000 for females) [Table 2 and Figure 3].

If we consider the CR of 49.4 per 100 000 people for 1996 to continue at same rate then it would be expected that the total cases in 2015 would be 1158 cases. However, the total cases were 1632 cases which means that the incidence rate has increased. There was a rise in the CR by 41% between 1996 and 2015. This increase was higher (37.9%) between 2010 and 2015 compared to 2.3% 1996–2010.

There appears to be a true increase in the incidence of cancer in Oman which may be attributed to population aging. In 1996, about

Table 2: Comparison of frequency, crude and age-standardized rates of cancer cases by gender, Oman, 1996–2015.

Gender Frequency Percentage (%) Crude rates Age-standardized rates

1996Male 445 56.5 54.8 106.1Female 342 43.5 43.7 82.8

Total 787 100 49.4 95.02015

Male 760 46.6 64.2 101.0Female 872 53.4 75.1 109.0

Total 1632 100 69.7 105.01996-2015

Male 10 723 51.1 55.1 105.2Female 10 279 48.9 54.2 96.3

Total 21 002 100 56.4 125.7

0

200

400

600

800

1000

1200

1400

1600

1800Total Female Male

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Year

Frequ

ency

cases

Figure 3: Frequancy of cancer cases by gender, Oman, 1996–2015.

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16.0% of the population were under-5 years, 45.0% were under-15 years, and only 3.0% were above the age of 65 years. In 2015, the proportion of under-5 years were 14.9%, under-15 years reached 37.5% while the proportion of peopled aged 65 and above increased to 4.3%.

life expectancy in Oman has also increased from 72.0 years at birth in 1996 to 76.4 years in 2015. This rise in cancer incidence cases may be attributed to a number of factors, mainly the improvement in health care services over the past five decades including the introduction of an early detection program for breast cancer, the advanced in diagnostic and treatment modalities, and better public awareness about the cancer by non-governmental associations (introduced mammogram mobile unit as an outreach program into various regions of Oman). Other factors that might explain the increase in the incidence rates is the epidemiologic transition due to the rapid socioeconomic changes resulting in an increase in unhealthy lifestyles (tobacco use and its easy availability, physical inactivity, and unhealthy food habits).

Cancer incidence in Oman, 1996–2015 Between January 1996 and December 2015, there were 21 002 newly diagnosed cases of cancer among Omanis, of which 10 723 (55.1%) were in men

and 10 279 (48.9%) in women. On average, 1050 cases were reported annually in Oman. The average annual crude incidence rate was 55.1 per 100 000 males versus 54.2 per 100 000 females. The average annual ASRs were 105.2 and 96.3 per 100 000 males and females, respectively. The average annual CRs were 55.1 per 100 000 Omani males and 54.2 per 100 000 Omani females. The average annual world ASRs were 105.2 and 96.3 per 100 000 Omani males and females, respectively [Table 2].

Overall, there was an observed gradual decline in the trend of average annual ASR for Omani male over the 20-year period. On the other hand, the trend of average annual ASR for Omani females increased gradually over the same period [Figure 4]. The average annual age-specific incidence rates were observed to increase dramatically with advancing age in both sexes [Figure 5].

Tables 3 and 4 illustrate the frequency of incidence cases by age group and gender in Omanis for the period 1996–2015. While, tables 5 and 6 demonstrate ASRs in Omani males and females for the same period. Additionally, tables 7 and 8 show ASR by year, from 1996 to 2015, respectively.

Common cancer among OmanisOver the 20-year period (1996–2015), breast cancer

0

20

40

60

80

100

120

140

160

Female MaleLinear(Male)

Linear(Female)

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Year

ASR p

er 10

0 000

popu

lation

Figure 4: Age-standardized incidence rates (ASRs) of cancers among Omanis by year, 1996–2015.

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was the leading cancer among Omanis followed by non-Hodgkin's lymphoma, leukemia, colorectal, and thyroid [Table 9].

1) Breast cancerBreast Cancer was the leading cancer among males and females in Oman and accounted for 10.9% of

total malignancies [Table 9]. This malignancy has quadrupled in Oman in 2015 (n = 217) compared to 1996 (n = 53) [Figure 6].

Between 1996 and 2015, there were 2280 cases of breast cancer reported in Oman: 2181 in women and only 99 in men. The ASR for breast cancer in Omani women was 20.8 per 100 000 females with

0

100

200

300

400

500

600

700

800 FemaleMale

75+7065605550454035302520151050

Age, years

Incide

nce r

ate pe

r 100

000

Figure 5: Average annual age-specific incidence rates of cancers by gender and age among Omanis, 1996–2015.

0

50

100

150

200

250

FemaleMale

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Total

Year

Frequ

ency

cases

Figure 6: Trends of breast cancer in both genders by year.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

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Tabl

e 3:

Fre

quen

cy o

f inc

iden

t cas

es o

f can

cer i

n m

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996–

2015

.

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

(%)

ICD

(10t

h)

lip

240

00

00

00

02

02

23

22

56

0.2

C00

Tong

ue10

10

00

00

30

52

1019

2012

153

39

1.0

C01

-02

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th11

40

00

01

32

49

1212

1311

1710

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1.1

C03

-06

Saliv

ary g

land

s36

00

02

04

11

42

13

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13

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3C

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21

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er o

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00

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nx10

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27

97

37

1118

810

58

31

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rynx

280

21

01

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218

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126

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Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

(%)

ICD

(10t

h)

Peni

s6

00

00

00

00

00

11

11

00

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osta

te99

80

10

22

00

14

717

5294

196

182

199

241

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s12

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er m

ale g

enita

l org

ans

50

00

00

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11

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63K

idne

y23

60

276

31

39

714

1820

3015

2523

1520

2.3

C64

Ren

al p

elvi

s4

00

00

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00

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ter

40

00

00

00

00

00

10

21

00

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66Bl

adde

r59

00

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11

26

1024

1935

6261

8983

7911

45.

7C

67O

ther

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ary o

rgan

s6

01

00

00

00

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68Ey

e52

015

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01

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57

27

30.

5C

69Br

ain,

ner

vous

syst

em40

40

5142

3126

2119

2324

1826

3225

2118

1710

3.9

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-72

Thyr

oid

242

00

02

921

2930

2022

2218

1725

127

82.

4C

73A

dren

al g

land

460

303

30

12

00

00

32

01

10

0.4

C74

Oth

er en

docr

ine

100

11

01

10

02

11

10

00

10

0.1

C75

Hod

gkin

dise

ase

384

011

4339

3942

3034

2814

2726

1411

104

123.

7C

81N

on-H

odgk

in's

lym

phom

a93

20

2842

2548

3753

4452

6467

8078

8774

8073

9.1

C82

-85,

C96

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unop

rolif

erat

ive d

iseas

es5

00

00

00

00

10

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20

00

20

C88

Mul

tiple

mye

lom

a17

70

00

01

14

20

612

2328

3322

2025

1.7

C90

lym

phoi

d le

ukae

mia

443

010

488

4952

249

124

1013

175

1913

1311

4.3

C91

Mye

loid

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1018

1924

1925

1818

2112

2320

1626

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nspe

cifie

d80

09

79

128

25

22

25

84

22

10.

8C

95M

yelo

prol

ifera

tive d

isord

ers (

MPD

)15

00

10

00

11

10

21

31

11

20.

1M

PDM

yelo

dysp

lasti

c syn

drom

es (M

DS)

50

10

00

10

00

00

00

20

01

0M

DS

Oth

er an

d un

spec

ified

(O&

U)

438

016

33

62

129

1422

2646

4973

4763

474.

3O

&U

All

sites

(All)

10 72

30

388

296

231

296

312

331

339

413

502

674

986

982

1465

1110

1131

1267

104

All

All

sites

but

C44

(Allb

C44

)10

289

038

529

222

729

330

431

932

940

148

765

195

593

914

0210

5010

6511

9010

0A

llbC

44

UN

K: u

nkow

n; IC

D: I

nter

natio

nal C

lassifi

catio

n of D

iseas

es, 10

th re

vision

.

Tabl

e 3:

Fre

quen

cy o

f inc

iden

t cas

es o

f can

cer i

n m

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996–

2015

. -co

ntinued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

368 Na jl a A . A l -l awat i , et a l . 369Na jl a A . A l -l awat i , et a l .

Tabl

e 4:

Fre

quen

cy o

f inc

iden

t cas

es o

f can

cer i

n fe

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ag

e gro

up, O

man

, 199

6–20

15.

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

(%)

ICD

(1

0th)

lip

120

10

10

00

01

11

11

11

12

0.1

C00

Tong

ue50

00

10

01

13

44

96

75

43

20.

5C

01-0

2M

outh

640

00

01

01

23

33

135

147

48

0.6

C03

-06

Saliv

ary g

land

s43

01

10

36

33

44

28

32

11

10.

4C

07-0

8To

nsil

00

00

00

00

00

00

00

00

00

0.0

C09

Oth

er o

roph

aryn

x7

00

00

00

01

00

11

10

20

10.

1C

10N

asop

hary

nx48

00

00

54

24

78

65

21

12

10.

5C

11H

ypop

hary

nx17

00

00

00

00

24

10

13

04

20.

2C

12-1

3Ph

aryn

x uns

peci

fied

50

00

00

00

02

01

00

10

01

0.1

C14

Oes

opha

gus

134

00

00

00

11

23

413

1130

1623

301.

3C

15St

omac

h51

20

01

11

103

1320

3740

7162

8850

6253

5.1

C16

Smal

l int

estin

e28

00

00

00

10

03

42

23

27

40.

3C

17C

olon

376

00

03

48

1219

2328

3851

4057

2824

413.

8C

18R

ectu

m23

20

00

01

35

1221

2715

3134

2521

2314

2.3

C19

-20

Anu

s23

00

00

00

10

21

05

32

15

30.

2C

21li

ver

245

08

01

14

35

79

1839

3241

2925

232.

5C

22G

allb

ladd

er et

c.90

00

00

00

02

411

89

1017

1110

80.

9C

23-2

4Pa

ncre

as12

60

00

00

11

23

610

1918

318

1314

1.3

C25

Nos

e, sin

uses

etc.

230

10

11

00

21

04

13

31

32

0.2

C30

-31

lary

nx29

00

00

00

11

16

02

53

43

30.

3C

32Tr

ache

a, br

onch

us, a

nd lu

ng22

90

10

01

13

49

813

3229

3929

2733

2.3

C33

-34

Oth

er th

orac

ic o

rgan

s18

08

00

10

11

02

01

11

00

20.

2C

37-3

8Bo

ne94

02

723

1810

103

33

28

11

00

30.

9C

40-4

1M

elan

oma o

f ski

n34

00

01

00

42

13

46

13

24

30.

3C

43O

ther

skin

332

01

31

62

107

1120

2932

4042

3638

543.

3C

44M

esot

helio

ma

30

00

00

00

00

01

00

01

01

0.0

C45

Kap

osi s

arco

ma

170

00

00

00

01

60

03

32

11

0.2

C46

Con

nect

ive a

nd so

ft tis

sue

120

027

49

77

107

69

124

52

13

71.

2C

47-4

9Br

east

2181

00

00

225

9518

427

529

029

730

922

917

510

989

102

21.9

C50

Vulv

a24

00

00

01

00

12

21

34

15

40.

2C

51Va

gina

300

10

01

02

01

12

51

57

13

0.3

C52

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

370 Na jl a A . A l -l awat i , et a l . 371Na jl a A . A l -l awat i , et a l .

Tabl

e 4:

Fre

quen

cy o

f inc

iden

t cas

es o

f can

cer i

n fe

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ag

e gro

up, O

man

, 199

6–20

15.

-continued

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

(%)

ICD

(1

0th)

Cer

vix u

teri

550

00

00

01

1028

5368

7173

6164

3252

375.

5C

53C

orpu

s ute

ri20

60

00

10

13

79

1518

2427

4524

1814

2.1

C54

Ute

rus u

nspe

cifie

d86

01

00

00

24

88

1310

811

68

70.

9C

55O

vary

463

01

415

2735

3327

1536

4044

3748

2840

334.

7C

56O

ther

fem

ale g

enita

l org

ans

100

00

01

01

01

13

01

01

10

0.1

C57

Plac

enta

230

00

01

26

31

34

21

00

00

0.2

C58

Kid

ney

204

040

73

24

710

119

1228

1620

188

92.

1C

64R

enal

pel

vis

10

00

00

00

00

00

00

00

01

0.0

C65

Ure

ter

40

00

00

00

00

10

10

00

11

0.0

C66

Blad

der

204

02

00

12

66

111

1612

2127

2824

472.

1C

67O

ther

urin

ary o

rgan

s2

00

00

00

00

00

01

00

01

00.

0C

68Ey

e45

020

41

20

01

12

12

04

03

40.

5C

69

Brai

n, n

ervo

us sy

stem

281

036

3428

2418

1614

1416

1917

1316

64

62.

8C

70-7

2

Thyr

oid

1035

00

37

4710

614

515

013

311

310

874

4045

1930

1510

.4C

73A

dren

al g

land

420

245

01

22

12

11

11

01

00

0.4

C74

Oth

er en

docr

ine

30

00

10

01

01

00

00

00

00

0.0

C75

Hod

gkin

dise

ase

225

04

1721

2230

2315

713

167

1813

77

52.

3C

81N

on-H

odgk

in's

lym

phom

a60

10

2727

1623

3240

2829

3343

6448

8335

3043

6.0

C82

-85,

C

96Im

mun

opro

lifer

ativ

e dise

ases

30

00

00

00

00

11

00

00

01

0.0

C88

Mul

tiple

mye

lom

a12

30

00

00

00

13

46

2214

2518

1317

1.2

C90

lym

phoi

d le

ukae

mia

275

010

153

2713

99

71

67

64

106

97

2.8

C91

Mye

loid

leuk

aem

ia24

40

1611

1824

1715

1816

1615

1612

1810

139

2.5

C92

-94

leuk

aem

ia u

nspe

cifie

d77

014

1014

54

21

24

11

35

42

50.

8C

95M

yelo

prol

ifera

tive d

isord

ers (

MPD

)7

00

00

10

00

00

00

01

14

00.

1M

PDM

yelo

dysp

lasti

c syn

drom

es (M

DS)

50

01

02

00

00

00

00

00

02

0.1

MD

SO

ther

and

unsp

ecifi

ed (O

&U

)41

00

173

29

49

1322

3032

5029

5342

5441

4.1

O&

UA

ll sit

es (A

ll)10

279

035

419

619

525

835

050

061

374

589

095

611

3090

710

9066

270

373

010

3A

llA

ll sit

es b

ut C

44 (A

llbC

44)

9947

035

319

319

425

234

849

060

673

487

092

710

9886

710

4862

666

567

610

0A

llbC

44

UN

K: u

nkow

n; IC

D: I

nter

natio

nal C

lassifi

catio

n of D

iseas

es, 10

th re

vision

.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

370 Na jl a A . A l -l awat i , et a l . 371Na jl a A . A l -l awat i , et a l .

Tabl

e 5:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

canc

er in

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ag

e gro

up, O

man

, 199

6–20

15.

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

lip

240

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.2

0.0

0.4

0.4

0.8

0.7

0.9

3.1

3.0

0.1

0.2

0.03

0.3

C00

Tong

ue10

10

0.0

0.0

0.0

0.0

0.1

0.0

0.4

0.2

1.4

3.6

4.5

3.2

4.9

1.3

1.9

4.5

0.5

1.0

0.1

1.1

C01

-02

Mou

th11

40

0.0

0.0

0.0

0.0

0.1

0.1

0.3

1.0

1.7

2.3

2.9

3.0

5.5

4.3

6.2

5.0

0.6

1.1

0.1

1.2

C03

-06

Saliv

ary g

land

s36

00.

00.

00.

10.

00.

20.

10.

10.

40.

30.

20.

70.

82.

60.

41.

91.

50.

20.

30.

040.

3C

07-0

8To

nsil

130

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.3

0.2

0.4

0.5

1.0

0.0

0.0

0.5

0.1

0.1

0.01

0.1

C09

Oth

er o

roph

aryn

x22

00.

00.

00.

00.

00.

00.

10.

00.

00.

40.

20.

71.

10.

71.

31.

21.

00.

10.

20.

030.

2C

10N

asop

hary

nx10

10

0.0

0.1

0.1

0.3

0.4

0.4

0.2

0.7

1.6

3.4

1.8

2.7

1.6

3.4

1.9

0.5

0.5

1.0

0.09

0.9

C11

Hyp

opha

rynx

280

0.1

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.0

0.8

0.9

1.1

1.3

0.9

0.6

0.5

0.1

0.3

0.03

0.3

C12

-13

Phar

ynx u

nspe

cifie

d10

00.

00.

00.

00.

00.

00.

00.

00.

00.

10.

40.

40.

30.

00.

41.

20.

50.

10.

10.

010.

1C

14O

esop

hagu

s20

90

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.1

1.0

2.5

4.3

4.1

14.0

13.6

21.6

20.9

1.1

2.0

0.3

2.4

C15

Stom

ach

960

00.

00.

00.

00.

10.

20.

11.

42.

25.

310

.018

.927

61.9

53.7

96.3

83.6

4.9

9.3

1.4

10.9

C16

Smal

l int

estin

e43

00.

00.

00.

00.

00.

00.

00.

20.

20.

60.

20.

91.

43.

61.

74.

31.

50.

20.

40.

10.

5C

17C

olon

473

00.

00.

00.

00.

10.

31.

01.

93.

86.

110

.214

.613

.818

.920

.917

.317

.92.

44.

60.

54.

8C

18R

ectu

m30

10

0.0

0.0

0.0

0.0

0.4

0.5

1.1

1.3

2.6

4.6

9.0

8.7

15.6

15.3

16.7

14.4

1.6

2.9

0.4

3.2

C19

-20

Anu

s45

00.

00.

00.

00.

00.

00.

00.

10.

10.

61.

31.

11.

92.

30.

42.

54.

00.

20.

40.

10.

5C

21li

ver

544

00.

40.

10.

10.

00.

20.

30.

51.

13.

86.

113

.523

33.2

29.4

40.8

30.9

2.8

5.3

0.8

6.0

C22

Gal

lbla

dder

etc.

760

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.3

0.4

1.3

2.0

3.2

3.3

3.4

6.8

6.0

0.4

0.7

0.1

0.8

C23

-24

Panc

reas

209

00.

00.

00.

00.

00.

00.

10.

10.

41.

62.

76.

76.

511

.114

.114

.815

.91.

12.

00.

32.

4C

25N

ose,

sinus

es et

c.31

00.

00.

00.

00.

10.

10.

00.

20.

00.

30.

81.

30.

30.

71.

31.

22.

00.

20.

30.

030.

3C

30-3

1la

rynx

130

00.

00.

00.

00.

00.

00.

00.

20.

51.

62.

74.

93.

26.

26.

08.

08.

50.

71.

30.

21.

4C

32Tr

ache

a, br

onch

us, a

nd

lung

720

00.

00.

00.

10.

00.

10.

40.

41.

54.

08.

418

.221

.948

.543

.066

.748

.33.

77.

01.

18.

2C

33-3

4

Oth

er th

orac

ic o

rgan

s39

00.

00.

00.

00.

00.

10.

20.

00.

40.

00.

20.

90.

52.

00.

42.

54.

00.

20.

40.

040.

4C

37-3

8Bo

ne14

70

0.2

0.6

1.1

1.0

0.8

0.7

0.5

1.0

0.4

0.6

1.1

0.5

2.9

1.3

1.2

1.0

0.8

1.4

0.07

0.8

C40

-41

Mel

anom

a of s

kin

420

0.0

0.1

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.8

1.1

1.1

2.3

2.1

3.1

2.5

0.2

0.4

0.1

0.4

C43

Oth

er sk

in43

40

0.1

0.2

0.2

0.1

0.3

0.7

0.8

1.3

2.2

4.4

7.0

11.6

20.5

25.6

40.8

38.3

2.2

4.2

0.6

4.6

C44

Mes

othe

liom

a18

00.

00.

00.

00.

00.

00.

00.

00.

00.

10.

00.

70.

80.

31.

31.

92.

00.

10.

20.

030.

2C

45K

apos

i sar

com

a57

00.

00.

00.

00.

10.

10.

30.

40.

60.

30.

81.

31.

42.

01.

73.

11.

50.

30.

60.

10.

5C

46

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

372 Na jl a A . A l -l awat i , et a l . 373Na jl a A . A l -l awat i , et a l .

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

Con

nect

ive a

nd so

ft tis

sue

175

00.

60.

60.

50.

70.

90.

80.

51.

11.

01.

52.

73.

02.

62.

61.

24.

51.

01.

70.

11.

2C

47,C

49

Brea

st99

00.

00.

00.

00.

00.

00.

10.

10.

71.

02.

52.

74.

14.

93.

04.

36.

50.

51.

00.

11.

1C

50Pe

nis

60

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.2

0.2

0.3

0.3

0.0

0.0

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0.1

0.01

0.1

C60

Pros

tate

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00.

00.

00.

10.

10.

00.

00.

10.

41.

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311

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.463

.877

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312

05.

19.

71.

511

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120

00.

50.

10.

00.

41.

11.

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11.

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60.

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62O

ther

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e gen

ital

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63

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ney

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51.

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310

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pel

vis

40

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0.9

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Ure

ter

40

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C66

Blad

der

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C67

Oth

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rinar

y org

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60

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0.0

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0.0

0.0

0.4

0.0

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0.4

0.6

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C68

Eye

520

0.6

0.0

0.0

0.1

0.1

0.0

0.1

0.2

0.3

0.2

0.4

1.4

2.3

0.9

4.3

1.5

0.3

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C69

Brai

n, n

ervo

us sy

stem

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91.

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72.

62.

65.

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86.

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02.

13.

90.

32.

9C

70-7

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0.0

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0.4

0.9

1.6

2.3

2.1

3.2

4.2

4.0

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Adr

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50.

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40.

60.

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20.

40.

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3C

74O

ther

endo

crin

e10

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00.

00.

00.

00.

00.

00.

00.

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10.

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60.

00.

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10.

010.

1C

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in d

iseas

e38

40

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1.6

1.5

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1.6

2.6

3.0

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3.8

3.6

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C81

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gkin

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212

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82-8

5,

C96

Imm

unop

rolif

erat

ive

dise

ases

50

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0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.0

0.0

0.5

0.0

0.0

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0.03

0.0

0.0

0.0

C88

Mul

tiple

mye

lom

a17

70

0.0

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0.0

0.0

0.0

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0.2

0.0

0.9

2.3

5.2

7.6

10.7

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12.4

12.4

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lym

phoi

d le

ukae

mia

443

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03.

62.

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00.

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90.

41.

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53.

81.

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25.

58.

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52.

34.

30.

22.

6C

91M

yelo

id le

ukae

mia

320

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50.

50.

40.

70.

81.

31.

42.

72.

63.

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73.

27.

58.

59.

912

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63.

10.

32.

5C

92-9

4le

ukae

mia

uns

peci

fied

800

0.3

0.3

0.4

0.5

0.3

0.1

0.4

0.2

0.3

0.4

1.1

2.2

1.3

0.9

1.2

0.5

0.4

0.8

0.1

0.5

C95

Mye

lopr

olife

rativ

e di

sord

ers (

MPD

)15

00.

00.

00.

00.

00.

00.

10.

10.

10.

00.

40.

20.

80.

30.

40.

61.

00.

10.

10.

020.

1M

PD

Tabl

e 5:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

canc

er in

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ag

e gro

up, O

man

, 199

6–20

15.

-continued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

372 Na jl a A . A l -l awat i , et a l . 373Na jl a A . A l -l awat i , et a l .

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

Mye

lody

spla

stic

synd

rom

es (M

DS)

50

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.7

0.0

0.0

0.5

0.03

0.0

0.0

0.0

MD

S

Oth

er an

d un

spec

ified

(O

&U

)43

80

0.6

0.1

0.1

0.2

0.1

0.7

0.7

1.5

3.2

5.0

10.3

13.3

23.8

20.0

38.9

23.4

2.3

4.3

0.6

4.6

O&

U

All

sites

(All)

10 72

30

14.8

12.0

9.2

11.7

13.5

1825

.743

.972

.512

922

226

647

747

369

963

155

.110

412

.410

5.0

All

All

sites

but

C44

(A

llbC

44)

10 28

90

14.7

11.9

9.1

11.6

13.1

17.3

24.9

42.6

70.3

125

215

254

457

447

658

593

52.9

100

11.9

101.

0A

llbC

44

UN

K: u

nkow

n; C

UM

: cum

ulat

ive; I

CD: .I

nter

natio

nal C

lassifi

catio

n of D

iseas

es, 10

th re

vision

.

Tabl

e 5:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

can

cer i

n m

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996–

2015

. -co

ntinued

Tabl

e 6:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

canc

er in

fem

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996-

2015

.

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

lip

120

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.2

0.2

0.3

0.4

0.5

0.7

1.0

0.1

0.1

0.01

0.1

C00

Tong

ue50

00.

00.

00.

00.

00.

00.

10.

20.

40.

61.

61.

31.

91.

81.

92.

01.

00.

30.

50.

060.

5C

01-0

2M

outh

640

0.0

0.0

0.0

0.0

0.0

0.1

0.2

0.3

0.4

0.5

2.8

1.4

4.9

3.4

2.7

4.0

0.3

0.6

0.08

0.7

C03

-06

Saliv

ary g

land

s43

00.

00.

00.

00.

10.

30.

20.

20.

40.

60.

41.

70.

80.

70.

50.

70.

50.

20.

40.

030.

3C

07-0

8To

nsil

00

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0.0

0.0

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0.0

0.0

0.0

0.0

0.0

0.0

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Oth

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roph

aryn

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00.

00.

00.

00.

00.

00.

10.

00.

00.

20.

20.

30.

01.

00.

00.

50.

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10.

010.

1C

10N

asop

hary

nx48

00.

00.

00.

00.

20.

20.

10.

30.

71.

11.

11.

10.

50.

40.

51.

30.

50.

30.

50.

040.

4C

11H

ypop

hary

nx17

00.

00.

00.

00.

00.

00.

00.

00.

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60.

20.

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20.

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2C

12-1

3Ph

aryn

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peci

fied

50

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0.0

0.0

0.0

0.0

0.2

0.0

0.2

0.0

0.0

0.4

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C14

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134

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00.

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00.

10.

10.

20.

40.

72.

83.

010

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715

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71.

30.

21.

6C

15St

omac

h51

20

0.0

0.0

0.0

0.0

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1.0

2.1

5.1

7.2

15.2

16.7

31.0

24.0

41.1

26.3

2.7

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0.7

5.7

C16

Smal

l int

estin

e28

00.

00.

00.

00.

00.

00.

10.

00.

00.

40.

70.

40.

51.

11.

04.

62.

00.

20.

30.

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17C

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376

00.

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00.

10.

20.

40.

71.

52.

43.

96.

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80.

43.

9C

18R

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m23

20

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0.0

0.0

0.0

0.1

0.3

0.9

2.2

3.7

2.7

6.6

9.2

8.8

10.1

15.2

7.0

1.2

2.3

0.3

2.4

C19

-20

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

374 Na jl a A . A l -l awat i , et a l . 375Na jl a A . A l -l awat i , et a l .

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

Anu

s23

00.

00.

00.

00.

00.

00.

10.

00.

20.

10.

01.

10.

80.

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53.

31.

50.

10.

20.

030.

3C

21li

ver

245

00.

30.

00.

00.

00.

20.

20.

40.

71.

23.

28.

48.

614

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7C

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00.

00.

00.

00.

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41.

51.

41.

92.

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05.

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64.

00.

50.

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4Pa

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60

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0.0

0.0

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0.1

0.2

0.3

0.8

1.8

4.1

4.9

10.9

3.8

8.6

7.0

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1.3

0.2

1.5

C25

Nos

e, sin

uses

etc.

230

0.0

0.0

0.0

0.0

0.0

0.0

0.2

0.1

0.0

0.7

0.2

0.8

1.1

0.5

2.0

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0.2

0.03

0.2

C30

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lary

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00.

00.

00.

00.

00.

00.

10.

10.

10.

80.

00.

41.

41.

11.

92.

01.

50.

20.

30.

040.

3C

32Tr

ache

a, br

onch

us, a

nd

lung

229

00.

00.

00.

00.

00.

00.

20.

31.

01.

12.

36.

97.

813

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22.

30.

32.

6C

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rgan

s18

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00.

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10.

10.

00.

30.

00.

20.

30.

40.

00.

01.

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090.

20.

010.

1C

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00.

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31.

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20.

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40.

41.

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50.

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00.

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20.

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40.

71.

30.

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02.

71.

50.

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43O

ther

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332

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0.6

0.5

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5.2

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14.8

17.3

25.2

26.8

1.8

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3.6

C44

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00.

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80.

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70.

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onne

ctiv

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soft

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0.4

0.3

0.3

0.6

0.5

0.6

1.2

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0.9

1.4

0.7

0.5

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0.6

1.2

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0.8

C47

,C49

Brea

st21

810

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5.3

14.1

29.3

40.2

53.3

66.2

61.8

61.7

52.4

5950

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240

0.0

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0.0

0.0

0.1

0.3

0.4

0.2

0.8

1.4

0.5

3.3

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0.2

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C51

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00.

00.

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10.

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41.

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31.

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71.

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20.

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5.6

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12.7

15.6

16.5

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3.9

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C55

Ova

ry46

30

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0.5

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0.5

0.7

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C57

Plac

enta

230

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0.3

0.2

0.1

0.4

0.7

0.4

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C58

Kid

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0.0

0.0

0.0

0.5

0.01

0.0

0.0

0.0

C65

Ure

ter

40

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.2

0.0

0.0

0.0

0.7

0.5

0.02

0.0

0.01

0.0

C66

Tabl

e 6:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

canc

er in

fem

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996–

2015

. -co

ntinued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

374 Na jl a A . A l -l awat i , et a l . 375Na jl a A . A l -l awat i , et a l .

Site

All

ages

Age

U

NK

0-5-

10-

15-

20-

25-

30-

35-

40-

45-

50-

55-

60-

65-

70-

75+

Cru

de

rate

(%)

CU

M

0-74

ASR

ICD

(1

0th)

Blad

der

204

00.

10.

00.

00.

00.

10.

30.

50.

11.

52.

92.

65.

79.

513

.515

.923

.31.

12.

10.

32.

3C

67O

ther

urin

ary o

rgan

s2

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

20.

00.

00.

00.

70.

00.

010.

00.

00.

0C

68Ey

e45

00.

80.

20.

00.

10.

00.

00.

10.

10.

30.

20.

40.

01.

40.

02.

02.

00.

20.

50.

030.

3C

69Br

ain,

ner

vous

syst

em28

10

1.4

1.4

1.2

1.0

0.8

0.9

1.1

1.5

2.2

3.4

3.6

3.5

5.6

2.9

2.7

3.0

1.5

2.8

0.2

1.9

C70

-72

Thyr

oid

1035

00.

00.

10.

31.

94.

88.

111

.514

.215

.719

.415

.910

.815

.99.

119

.97.

55.

510

.40.

77.

6C

73A

dren

al g

land

420

1.0

0.2

0.0

0.0

0.1

0.1

0.1

0.2

0.1

0.2

0.2

0.3

0.0

0.5

0.0

0.0

0.2

0.4

0.01

0.2

C74

Oth

er en

docr

ine

30

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.02

0.0

0.0

0.0

C75

Hod

gkin

dise

ase

225

00.

20.

70.

90.

91.

31.

31.

20.

71.

82.

91.

54.

94.

63.

44.

62.

51.

22.

30.

21.

6C

81N

on-H

odgk

in's

lym

phom

a60

10

1.1

1.1

0.7

0.9

1.4

2.2

2.2

3.1

4.6

7.7

13.7

13.0

29.3

16.8

19.9

21.4

3.2

6.0

0.6

5.4

C82

-85

,C96

Imm

unop

rolif

erat

ive

dise

ases

30

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.2

0.0

0.0

0.0

0.0

0.0

0.5

0.02

0.0

0.0

0.0

C88

Mul

tiple

mye

lom

a12

30

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.3

0.6

1.1

4.7

3.8

8.8

8.6

8.6

8.4

0.7

1.2

0.2

1.5

C90

lym

phoi

d le

ukae

mia

275

04.

02.

21.

10.

50.

40.

50.

50.

10.

81.

31.

31.

13.

52.

96.

03.

51.

52.

80.

11.

6C

91M

yelo

id le

ukae

mia

244

00.

60.

50.

71.

00.

80.

81.

41.

72.

22.

73.

43.

26.

34.

88.

64.

51.

32.

50.

21.

8C

92-9

4le

ukae

mia

uns

peci

fied

770

0.6

0.4

0.6

0.2

0.2

0.1

0.1

0.2

0.6

0.2

0.2

0.8

1.8

1.9

1.3

2.5

0.4

0.8

0.1

0.5

C95

Mye

lopr

olife

rativ

e di

sord

ers (

MPD

)7

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

40.

52.

70.

00.

040.

10.

020.

1M

PD

Mye

lody

spla

stic

synd

rom

es (M

DS)

50

0.0

0.0

0.0

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

1.0

0.03

0.1

0.0

0.0

MD

S

Oth

er an

d un

spec

ified

(O

&U

)41

00

0.7

0.1

0.1

0.4

0.2

0.5

1.0

2.3

4.2

5.7

10.7

7.8

18.7

20.2

35.8

20.4

2.2

4.1

0.5

4.3

O&

U

All

sites

(All)

10 27

90

14.1

8.3

8.1

10.6

15.7

27.8

47.1

79.3

124

172

242

245

384

318

466

363

54.2

103

10.8

96.3

All

All

sites

but

C44

(A

llbC

44)

9947

014

.08.

18

10.4

15.6

27.3

46.5

78.1

121

166

235

234

369

301

441

336

52.5

100

10.4

92.7

Allb

C44

UN

K: u

nkow

n; C

UM

: cum

ulat

ive; I

CD: I

nter

natio

nal C

lassifi

catio

n of D

iseas

es, 10

th re

vision

.

Tabl

e 6:

Age

-stan

dard

ized

inci

denc

e rat

es (A

SRs)

per

100

000

popu

latio

n of

canc

er in

fem

ales

by t

opog

raph

y/m

orph

olog

y and

age g

roup

, Om

an, 1

996–

2015

. -co

ntinued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

376 Na jl a A . A l -l awat i , et a l . 377Na jl a A . A l -l awat i , et a l .

Tabl

e 7:

Age

-stan

dard

ized

inci

denc

e rat

es p

er 1

00 00

0 po

pulat

ion

in m

ales

by t

opog

raph

y/m

orph

olog

y and

year

, Om

an, 1

996–

2015

.

Site

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

ICD

(1

0th)

lip

0.2

0.5

0.7

0.7

0.5

0.4

0.2

0.0

0.8

0.3

0.5

0.0

0.1

0.0

0.3

0.4

0.1

0.2

0.0

0.0

C00

Tong

ue1.

30.

90.

31.

21.

30.

70.

70.

90.

81.

01.

51.

31.

20.

70.

80.

90.

72.

10.

82.

1C

01-0

2M

outh

1.6

1.1

1.6

1.0

0.8

0.6

1.5

0.9

3.0

1.9

0.3

1.1

1.3

1.7

0.7

1.7

1.2

0.6

1.3

0.6

C03

-06

Saliv

ary g

land

s0.

30.

31.

30.

00.

20.

30.

50.

11.

80.

00.

00.

10.

30.

20.

50.

00.

30.

40.

20.

5C

07-0

8To

nsil

0.0

0.2

0.0

0.2

0.0

0.3

0.0

0.0

0.3

0.2

0.5

0.6

0.2

0.0

0.2

0.0

0.0

0.1

0.0

0.2

C09

Oth

er o

roph

aryn

x0.

00.

00.

00.

00.

50.

00.

00.

70.

80.

80.

40.

00.

30.

20.

20.

40.

00.

20.

20.

4C

10N

asop

hary

nx0.

91.

70.

80.

41.

51.

30.

30.

40.

71.

00.

60.

91.

51.

10.

80.

80.

30.

31.

31.

4C

11H

ypop

hary

nx0.

60.

30.

20.

40.

20.

10.

70.

22.

30.

00.

00.

00.

30.

70.

00.

00.

00.

00.

10.

3C

12-1

3Ph

aryn

x uns

peci

fied

0.2

0.2

0.0

0.0

0.0

0.0

0.0

0.3

0.3

0.0

0.0

0.3

0.0

0.2

0.0

0.2

0.0

0.1

0.1

0.2

C14

Oes

opha

gus

3.7

2.9

2.6

2.6

2.4

2.6

2.8

2.1

3.7

3.5

3.2

2.6

1.3

2.1

4.0

2.3

1.8

1.5

2.2

1.3

C15

Stom

ach

11.7

14.6

13.5

13.9

1313

.411

.97.

811

.916

.213

10.1

8.8

13.1

7.5

13.9

11.3

8.1

9.0

5.7

C16

Smal

l int

estin

e0.

20.

20.

20.

30.

20.

40.

60.

00.

00.

40.

00.

50.

00.

50.

41.

10.

40.

60.

71.

6C

17C

olon

2.7

2.8

3.5

1.5

3.0

2.4

3.1

3.2

4.7

5.8

5.8

5.1

4.4

4.9

6.3

6.8

7.3

6.7

6.3

7.0

C18

Rec

tum

1.5

3.4

2.5

1.8

1.1

31.

63.

11.

64.

53.

73.

02.

44.

82.

15.

54.

14.

43.

15.

0C

19-2

0A

nus

0.8

0.0

0.2

0.6

0.3

1.2

0.8

0.7

0.9

0.3

0.3

0.5

0.5

0.2

0.3

0.7

0.6

0.6

0.3

0.3

C21

live

r5.

94.

17.

89.

56.

16.

83.

05.

08.

49.

84.

64.

78.

04.

34.

26.

45.

54.

58.

05.

9C

22G

allb

ladd

er et

c.0.

00.

90.

51.

01.

20.

50.

70.

71.

72.

30.

51.

80.

91.

01.

31.

90.

30.

80.

50.

9C

23-2

4Pa

ncre

as2.

32.

81.

31.

72.

33

0.5

1.4

4.1

2.3

1.9

1.2

2.3

2.4

3.4

3.7

2.7

3.7

2.2

2.7

C25

Nos

e, sin

uses

etc.

0.2

0.6

0.2

0.7

0.5

0.0

0.0

0.3

0.8

0.6

0.4

0.9

0.1

0.2

0.2

0.7

0.0

0.0

0.0

0.2

C30

-31

lary

nx1.

91.

12.

71.

01.

20.

40.

41.

73.

32.

92.

51.

31.

10.

82.

71.

61.

11.

21.

01.

1C

32Tr

ache

a, br

onch

us, a

nd lu

ng7.

513

.08.

413

.18.

89.

96.

86.

910

.68.

38.

211

.27.

67.

86.

311

.25.

07.

38.

06.

9C

33-3

4

Oth

er th

orac

ic o

rgan

s1.

00.

80.

20.

20.

60.

50.

20.

10.

70.

10.

60.

30.

10.

70.

01.

20.

00.

20.

40.

1C

37-3

8Bo

ne0.

71.

31.

10.

80.

70.

20.

70.

91.

60.

90.

30.

50.

31.

01.

41.

80.

70.

70.

80.

6C

40-4

1M

elan

oma o

f ski

n0.

50.

90.

30.

00.

21.

00.

40.

31.

10.

30.

00.

30.

50.

80.

60.

70.

40.

70.

20.

3C

43O

ther

skin

7.7

6.9

5.8

3.1

3.4

3.8

5.4

4.1

5.0

5.4

5.1

5.9

5.7

6.2

5.2

4.8

3.7

4.5

3.2

3.1

C44

Mes

othe

liom

a0.

00.

00.

40.

40.

20.

20.

00.

30.

00.

00.

30.

30.

30.

00.

00.

90.

10.

20.

30.

2C

45K

apos

i sar

com

a0.

61.

70.

01.

30.

20.

50.

80.

70.

00.

50.

70.

50.

50.

50.

31.

40.

10.

60.

00.

1C

46C

onne

ctiv

e and

soft

tissu

e1.

42.

01.

61.

02.

01.

30.

91.

52.

00.

80.

60.

41.

20.

51.

40.

90.

70.

91.

01.

9C

47,C

49Br

east

0.5

1.0

0.6

0.7

0.7

1.4

0.8

1.1

1.0

1.7

1.8

0.9

0.1

1.4

2.0

1.3

1.4

0.8

1.8

0.9

C50

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

376 Na jl a A . A l -l awat i , et a l . 377Na jl a A . A l -l awat i , et a l .

Site

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

ICD

(1

0th)

Peni

s0.

00.

20.

00.

00.

00.

00.

00.

00.

00.

20.

00.

0.0.

30.

00.

30.

00.

00.

00.

10.

1C

60Pr

osta

te10

.812

.911

.412

9.0

10.6

7.3

6.9

11.2

12.3

8.7

16.1

12.3

13.1

12.8

17.0

13.5

13.7

12.7

13.3

C61

Testi

s0.

60.

50.

50.

50.

20.

70.

90.

71.

00.

50.

70.

50.

70.

50.

50.

70.

40.

60.

80.

9C

62O

ther

mal

e gen

ital o

rgan

s0.

00.

00.

00.

00.

00.

00.

00.

00.

50.

00.

00.

00.

10.

10.

00.

00.

00.

00.

00.

1C

63K

idne

y1.

61.

91.

31.

62.

61.

21.

22.

91.

72.

51.

21.

42

3.9

4.1

2.6

2.2

2.2

3.6

2.7

C64

Ren

al p

elvi

s0.

30.

00.

00.

00.

00.

00.

00.

00.

00.

00.

00.

70.

00.

00.

00.

00.

00.

00.

00.

2C

65U

rete

r0.

00.

00.

00.

00.

00.

30.

00.

00.

00.

00.

30.

00.

00.

00.

00.

00.

20.

00.

00.

2C

66Bl

adde

r8.

37.

55.

86.

63.

84.

44.

14.

85.

97.

77.

58.

86.

96.

78.

98.

76

7.8

8.3

6.6

C67

Oth

er u

rinar

y org

ans

0.0

0.0

0.2

0.3

0.1

0.0

0.2

0.0

0.0

0.0

0.6

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

C68

Eye

1.5

1.0

0.8

0.6

0.3

0.3

0.0

0.8

0.9

1.1

0.5

1.1

0.3

0.1

0.0

0.2

0.1

0.2

0.0

0.2

C69

Brai

n, n

ervo

us sy

stem

2.4

4.0

3.8

2.9

3.0

4.4

3.2

3.2

4.1

2.8

1.5

2.4

1.8

3.4

2.6

2.8

3.5

2.3

3.2

2.1

C70

-72

Thyr

oid

1.9

2.2

1.3

1.7

1.1

2.8

1.6

3.2

1.6

2.0

0.9

1.1

2.0

1.7

0.6

2.4

2.0

2.4

3.2

2.7

C73

Adr

enal

gla

nd0.

00.

10.

00.

10.

20.

10.

00.

30.

20.

20.

40.

10.

00.

30.

70.

30.

70.

30.

40.

3C

74O

ther

endo

crin

e0.

00.

20.

00.

10.

00.

20.

00.

00.

30.

00.

10.

10.

00.

10.

00.

00.

00.

10.

20.

0C

75H

odgk

in d

iseas

e1.

92.

23.

42.

22.

73.

02.

42.

43.

52.

32.

21.

63.

01.

71.

83.

53.

02.

22.

62.

3C

81N

on-H

odgk

in's

lym

phom

a8.

98.

69.

59.

07.

97.

37.

19.

911

.39.

47.

87.

49.

77.

57.

610

.97.

57.

28.

38.

6C

82-

85,C

96Im

mun

opro

lifer

ativ

e dise

ases

0.2

0.0

0.2

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.3

0.0

0.0

0.3

0.0

0.0

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C88

Mul

tiple

mye

lom

a1.

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82.

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42.

11.

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83.

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51.

22.

92.

52.

21.

81.

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51.

72.

53.

62.

65.

31.

71.

63.

32.

3C

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yelo

id le

ukae

mia

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1.9

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-94

leuk

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cifie

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21.

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40.

10.

40.

20.

30.

20.

30.

20.

70.

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yelo

prol

ifera

tive d

isord

ers

(MPD

)0.

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00.

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20.

00.

00.

20.

10.

00.

10.

20.

70.

30.

30.

50.

10.

00.

00.

00.

1M

PD

Mye

lody

spla

stic s

yndr

omes

(M

DS)

0.0

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0.0

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0.0

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0.0

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0.0

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MD

S

Oth

er an

d un

spec

ified

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&U

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All

sites

(All)

106

124

112

109

99.4

105

85.7

92.8

135

127

103

113

104

111

104

141

99.3

100

105

101

All

All

sites

but

C44

(Allb

C44

)98

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610

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88.7

130

121

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797

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498

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llbC

44

ICD

: .Int

erna

tiona

l Clas

sifica

tion o

f Dise

ases,

10th

revis

ion.

Tabl

e 7:

Age

-stan

dard

ized

inci

denc

e rat

es p

er 1

00 00

0 po

pulat

ion

in m

ales

by t

opog

raph

y/m

orph

olog

y and

year

, Om

an, 1

996–

2015

. -co

ntinued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

378 Na jl a A . A l -l awat i , et a l . 379Na jl a A . A l -l awat i , et a l .

Tabl

e 8:

Age

-stan

dard

ized

inci

denc

e rat

es p

er 1

00 00

0 po

pulat

ion

in fe

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ye

ar, O

man

, 199

6–20

15.

Site

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

ICD

(10t

h)

lip

0.0

0.0

0.4

0.0

0.0

0.0

0.0

0.2

0.2

0.0

0.3

0.4

0.5

0.0

0.0

0.0

0.3

0.0

0.0

0.2

C00

Tong

ue1.

70.

20.

00.

90.

50.

00.

10.

40.

30.

20.

40.

50.

30.

30.

81.

00.

50.

21.

00.

7C

01-0

2M

outh

0.4

2.0

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1.0

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0.4

0.1

0.7

0.6

0.6

0.3

1.3

0.8

1.5

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0.5

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0.4

C03

-06

Saliv

ary g

land

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50.

40.

20.

30.

01.

20.

80.

40.

70.

40.

20.

30.

20.

60.

10.

20.

20.

4C

07-0

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nsil

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Oth

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roph

aryn

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00.

10.

00.

0C

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hary

nx0.

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40.

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00.

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00.

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21.

00.

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60.

30.

10.

30.

6C

11H

ypop

hary

nx0.

00.

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20.

50.

50.

00.

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30.

30.

00.

00.

00.

00.

00.

10.

0C

12-1

3Ph

aryn

x uns

peci

fied

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0.0

0.0

0.0

0.0

0.0

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0.0

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C14

Oes

opha

gus

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11.

72.

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11.

21.

60.

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50.

6C

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omac

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27.

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74.

46.

84.

310

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14.

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55.

14.

84.

55.

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9C

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all i

ntes

tine

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0.5

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C17

Col

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44.

03.

53.

04.

64.

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82.

84.

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ectu

m1.

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01.

52.

22.

62.

01.

22.

72.

51.

92.

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22.

53.

73.

43.

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19-2

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nus

0.0

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C21

live

r0.

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63.

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12.

51.

71.

91.

92.

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22.

74.

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7C

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allb

ladd

er et

c.1.

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21.

11.

40.

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81.

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51.

40.

61.

11.

30.

71.

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7C

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41.

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31.

80.

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02.

01.

00.

31.

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01.

31.

91.

52.

61.

81.

5C

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ose,

sinus

es et

c.0.

00.

20.

50.

00.

30.

10.

80.

30.

00.

40.

00.

30.

01.

10.

30.

20.

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10.

3C

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1la

rynx

0.5

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0.3

0.2

0.2

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C32

Trac

hea,

bron

chus

, an

d lu

ng4.

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02.

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52.

43.

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63.

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41.

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63.

62.

72.

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4

Oth

er th

orac

ic o

rgan

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ne0.

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80.

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oma o

f ski

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ther

skin

3.4

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4.0

4.1

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C44

Mes

othe

liom

a0.

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00.

00.

20.

00.

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00.

00.

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i sar

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20.

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46

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

378 Na jl a A . A l -l awat i , et a l . 379Na jl a A . A l -l awat i , et a l .

Site

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

ICD

(10t

h)

Con

nect

ive a

nd so

ft tis

sue

1.0

1.9

0.3

1.1

1.5

0.6

1.0

0.3

1.9

0.7

0.8

0.7

0.7

0.2

0.3

0.2

1.2

0.7

0.5

1.1

C47

,C49

Brea

st13

.613

.813

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.915

.416

.015

.013

.625

.622

.323

.523

.225

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.122

.226

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50Vu

lva

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0.3

0.3

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0.8

1.0

0.0

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C51

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na0.

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40.

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60.

20.

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00.

40.

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50.

00.

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00.

00.

10.

70.

10.

70.

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52C

ervi

x ute

ri6.

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67.

26.

37.

35.

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46.

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46.

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51.

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32.

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6C

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teru

s uns

peci

fied

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0.6

0.6

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0.5

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C55

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ry1.

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ther

fem

ale g

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gans

0.0

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C57

Plac

enta

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C58

Kid

ney

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Ren

al p

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r0.

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11.

31.

31.

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1.7

1.7

2.3

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C92

-94

Tabl

e 8:

Age

-stan

dard

ized

inci

denc

e rat

es p

er 1

00 00

0 po

pulat

ion

in fe

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ye

ar, O

man

, 199

6–20

15.

-continued

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

380 Na jl a A . A l -l awat i , et a l . 381Na jl a A . A l -l awat i , et a l .

infiltrating ductal carcinoma as the most frequent histopathological type accounting for 73.9% of all breast cancer [Figure 7].

2) Non-Hodgkin's lymphoma Non-Hodgkin's lymphoma (NHl) is the second most common malignancy among Omanis and accounted for 7.3% of total malignancies. There was an increase of 96.8% in the total of NHl cases reported in Oman in 2015 (n = 122) compared to 1996 (n = 62) [Figure 8].

Between 1996 and 2015, there were 1533 cases of NHl reported in Oman: 932 in men and 601 in women [Table 9]. The world ASR by gender were 8.3 cases per 100 000 Omani males and 5.4 cases per 100 000 females. Figure 9 shows the morphology of NHl reported over past 20 years in both genders.

3) Leukemialeukemia is the third most common malignancy among Omanis and accounted for 6.8% of total malignancies in both genders [Table 9]. The total number of leukaemia cases reported in Oman was more than doubled in 2015 (n = 97) compared to 1996 (n = 43) [Figure 10].

Between 1996 and 2015, there were 1439 cases of leukemia reported in Oman: 843 in men and 596 in women [Table 5 and 6]. The ASR by gender were 5.6 cases per 100 000 Omani males and 3.9 cases per 100 000 females. lymphoid leukaemia accounted for 50% of all leukaemia followed by myeloid leukaemia 39.0% and unspecified leukaemia 11.0%.

4) Colorectal cancerColorectal cancer is the fourth most common malignancy among Omanis and accounted for 6.6% of total malignancies [Table 9]. There was an increase of more than four folds in the total cases of colorectal cancer reported in Oman in 2015 (n = 148) compared to 1996 (n = 28) [Figure 11].Si

te19

9619

9719

9819

9920

0020

0120

0220

0320

0420

0520

0620

0720

0820

0920

1020

1120

1220

1320

1420

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D (1

0th)

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rativ

e di

sord

ers (

MPD

)0.

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00.

00.

00.

30.

00.

40.

00.

40.

30.

00.

00.

00.

00.

00.

00.

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PD

Mye

lody

spla

stic

synd

rom

es (M

DS)

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0.0

0.0

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0.0

0.0

0.0

0.0

0.0

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0.5

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S

Oth

er an

d un

spec

ified

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&U

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92.

03.

71.

52.

62.

22.

0O

&U

All

sites

(All)

82.8

97.1

97.4

92.7

90.2

86.6

73.9

83.5

120

105

108

101

104

97.4

100

115

92.9

99.6

100

109

All

All

sites

but

C44

(A

llbC

44)

79.4

94.5

94.6

87.3

85.4

83.3

72.4

81.1

116

101

104

98.8

99.4

92.6

95.2

111

89.5

95.7

97.4

104

Allb

C44

ICD

: Int

erna

tiona

l Clas

sifica

tion o

f Dise

ases,

10th

revis

ion.

Tabl

e 8:

Age

-stan

dard

ized

inci

denc

e rat

es p

er 1

00 00

0 po

pulat

ion

in fe

mal

es b

y top

ogra

phy/

mor

phol

ogy a

nd ye

ar, O

man

, 199

6–20

15.

-continued

Table 9: Five most common cancer among Omanis (males and females), 1996–2015.

Topography Frequency Percentage (%)

Breast 2280 10.9Non-Hodgkin's lymphoma 1533 7.3leukemia 1439 6.8Colorectal 1382 6.6Thyroid 1277 6.1

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

380 Na jl a A . A l -l awat i , et a l . 381Na jl a A . A l -l awat i , et a l .

Between 1996 and 2015, there were 1382 cases of colorectal cancer reported in Oman: 774 in men and 608 in women. The ASR by was 8 per 100 000 and 6.3 cases per 100 000 males and females, respectively [Table 5 and 6]. Adenocarcinoma was the most frequent histopathological type accounting for 77% of all colorectal cancer [Figure 12].

5) Thyroid cancerThyroid cancer is the fifth most common malignancy

among Omanis and accounted for 6.1% of all malignancies [Table 9]. There was a four-fold increase in the total cases of thyroid cancer reported in Oman in 2015 (n = 164) compared to 1996 (n = 39) [Figure 13].

Between 1996 and 2015, there were 1277 cases of thyroid cancer reported in Oman: 242 in men and 1035 in women. The ASR by gender were 2.0 cases per 100 000 Omani males and 7.6 cases per 100 000 females [Tables 5 and 6]. Papillary carcinoma was the

Infiltrating duct carinoma, NOS 73.9%

Infiltrating duct mixed metaplastic 0.8%

Others 3.4%

Adenocarinoma 0.9%

Mucinous adencarcinoma 1.0%

Carinoma, NOS0.8%

Paget disease and intraductal carcinoma 1.1%

Neoplasm, malignant 3.5%

Carcinoma, NOS 9.8%

Phyllodes tumor, maligant 1.0%Lobular carcinoma, NOS, 3.9%

Figure 7: Morphology of breast cancer in Omani males and females, 1996–2015.

precursor cell lymphoblastic lymphoma 2.0%

Mantle cell lymphoma 1.0%

Malignant lymphoma, NOS 9.0%

Malignant histiocytosis 0.0%

Malignant lymphoma, non-Hodgkin,

NOS 38.0%

Others 5.0% Mature T-cell lymphoma, NOS 2.0%

Mycosis fungoides 1.0%

Marginal zone B-cell lymphoma, NOS1.0%

Burkitt lymphoma, NOS 4.0%

Follicular lymphoma 6.0%

Malignant lymphoma, large B-cell,

diffuse, NOS 28.0%

Precursor B cell lymphoblastic lymphoma 1.0%

Precursor T cell lymphoblastic lymphoma 1.0%

Malignant lymphoma, small B lymphcyttic, NOS 1.0%

Figure 9: Morphology of non-Hodgkin's lymphoma in Omanis, 1996–2015.

0

20

40

60

80

100

120

140

FemaleMale

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Frequ

ency

case

s

Year

Figure 8: Trends of non-Hodgkin's lymphoma among Omanis, 1996–2015.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

382 Na jl a A . A l -l awat i , et a l . 383Na jl a A . A l -l awat i , et a l .

most frequent histopathological type accounting for 83.0% of all thyroid cancer [Figure 14].

Five common cancer in Omani male Between 1996 and 2015, prostate cancer was

observed to be the leading malignancy in Omani males (998 new cases), followed by cancers of the stomach, NHl, leukemia, and colorectal. Table 10 summarizes the five most common cancers in Omani male in three different periods 1996–2005, 2006–2015, and over 20 years 1996–2015.

1) Prostate cancerProstate cancer was the leading cancer in Omani males between 1996 and 2015 and accounting for 9.3% of all incident cases in males with an average annual ASR of 11.6/100 000 people [Tables 5 and 10]. Prostate cancer incidence continued to rise slowly over the years; the lowest ASR (6.9/100 000) was reported in 2003 and the highest (17.0/100 000) in 2011 [Table 7]. Age-specific incidence among males begins in the age group 40–45 year and steadily rises to peak in the in the age group 70–74 year [Table 5].

2) Stomach cancerStomach cancer was the second most common cancer in Omani males between 1996 and 2015 and accounting for 8.9% of all incident cancers in males with an average annual ASR of 10.9 /100 000 male [Table 5]. The trend of stomach cancer incidence had declined over the years; the lowest ASR (5.7/100 000) was reported in 2015 and the highest

0

20

40

60

80

100

120

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Frequ

ency

case

s

Year

Total Female Male

Figure 10: Trends of leukemia in both genders, Oman, 1996–2015.

Table 10: Frequency of the five common cancer among males in Oman.

Topography Frequency

Years 1996–2005Stomach 492Non-Hodgkin's lymphoma 431Leukemia 385Prostate 382Lung 360

Years 2006–2015Prostate 616Colorectal 534Non-Hodgkin's lymphoma 501Stomach 468Leukemia 458

Years 1996–2015Prostate 998Stomach 960Non-Hodgkin's lymphoma 932Leukemia 843Colorectal 774

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

382 Na jl a A . A l -l awat i , et a l . 383Na jl a A . A l -l awat i , et a l .

(16.2/100 000) in 2005 [Table 7 and Figure 15]. Age-specific incidence among males begins in the 4th decade of life and steadily rises to a peak in the 7th

decade [Table 5].

3) Non-Hodgkin's lymphomaNHl is the third most common male cancer and accounted for 8.7% of all incident cancer cases in Omani males[Table 10]. The average annual ASR was 8.3/100 000 male [Table 5]. There was a minor

decrease in the ASR trend is observed from 1996 to 2015; the lowest ASR (7.1/100 000) was reported in 2002 and the highest (11.3/100 000) in 2004 [Table 4]. Age-specific incidence among males begins in the 30–35 year age group and gradually rises to peak in the 65–70 year age group.

4) Leukemialeukemia is the fourth most common cancer in males and accounted for 7.9% of all incident cancers in males with an average annual ASR of 5.6/100 000 male [Table 5]. The trend of leukaemia incidence has increased slowly over the years; the lowest ASR (3.9/100 000) was reported in 1996 and the highest (9.9/100 000) in 2011 [Table 7]. Age-specific incidence among males begins in the first decade of life and gradually rises to peak in the fifth decade [Table 5].

5) Colorectal cancerColorectal cancer is the fifth most common cancer in males and accounted for 7.2% of all incident cancers in males with an average annual ASR of 8.0/100 000 male [Figure 16]. The trend of colorectal cancer incidence continued to rise steadily over the years; the lowest ASR (3.3/100 000) was reported in 1999 and the highest (12/100 000) in 2015 [Table 7]. Age-specific incidence among males begins rising in

0

20

40

60

80

100

120

140

160

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Frequ

ency

case

s

Year

Total FemaleMale

Figure 11: Trends of colorectal cancer among Omanis, 1996–2015.

Mucinous adenocarcinoma 4.0%

Mucin-producing adenocarcinoma 3.0%

Neoplasm, malignant 4.0% Signet ring cell carcinoma 1.0%

Carcinoid Tumour 1.0%

Neuroendocrine carcinoma 1.0%

Carcinoma, NOS* 6.0%

Others 3.0%

Adenocarcinoma, NOS* 77.0%

Figure 12: Morphology of colorectal cancer in Omani males, 1996–2015.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

384 Na jl a A . A l -l awat i , et a l . 385Na jl a A . A l -l awat i , et a l .

in the 25–30 year age group and steadily rises to peak in the 60–65 year age group [Table 5].

Five common cancer in Omani female Between 1996 and 2015, breast cancer was the leading malignancy in Omani females with 2181 new cases, followed by cancers of the, thyroid, colorectal, NHl, and leukemia. Table 11 summarizes the five most common cancers among Omani female in

three different periods 1996–2005, 2006–2015, and finally over 20 years 1996–2015.

1) Breast cancerBreast cancer was by far the most common cancer among Omani females and accounted for 21.2%

0

5

10

15

20

25

30

35

40

45

50

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Frequ

ency

case

s

Year

Total FemaleMale

Figure 13: Trends of thyroid cancer among Omanis, 1996–2015.

Other specified carcinoma 3.0%

Unspecified carcinoma 3.0%

Unspecified malignant neoplasm 2.0%

Medullary carcinoma 1.0%

Follicular carcinoma 8.0%

Pappillary carcinoma 83.0%

Figure 14: Morphology of thyroid cancer among Omani females, 1996–2015.

Table 11: Frequency of five most common cancer among Omani females.

Topography Frequency

Years 1996–2005Breast 706Thyroid 339Cervix 267Stomach 263Leukemia 256

Years 2006–2015Breast 1475Thyroid 696Colorectal 442Non-Hodgkin's lymphoma 346Leukemia 340

Years 1996–2015Breast 2181Thyroid 1035Colorectal 608Non-Hodgkin's lymphoma 601Leukemia 596

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

384 Na jl a A . A l -l awat i , et a l . 385Na jl a A . A l -l awat i , et a l .

of all incident cases between 1996 and 2015, with an average annual ASR of 20.8/100 000 women [Table 6]. Its incidence has increased over the past 20-year period [Figure 17]. The lowest ASR (13.2/100 000) was noted in 1998 and the highest (26.9/100 000) was in 2015 [Table 8]. The age-specific incidence rates among female begins to rise in

the second to third decades of life with steadily rises to peak in the fourth and fifth decade years [Table 6].

2) Thyroid cancerThyroid cancer was the second most common female cancer between 1996 and 2015 and accounted for 10.0% of all incident cancer cases in Omani female,

0

2

4

6

8

10

12

14

16

18

20152014201320122011201020092008200720062005200420032002200120001999199819971996

ASR p

er 10

0 000

popu

lation

Year

Figure 15: Age-standardized incidence rates (ASRs) for stomach cancer in Omani males.

0

2

4

6

8

10

12

14

20152014201320122011201020092008200720062005200420032002200120001999199819971996

ASR p

er 10

0 000

popu

lation

Year

Figure 16: Age-standardized incidence rates (ASRs) for colorectal cencer in Omani males, 1996–2015.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

386 Na jl a A . A l -l awat i , et a l . 387Na jl a A . A l -l awat i , et a l .

with an average annual ASR of 7.6/100 000 people [Figure 18].

Thyroid cancer incidence continued to rise steadily over the years; the ASR was lowest (4.3/100 000) in 2000 and highest (14.3/100 000) in 2015 [Table 8]. Cases were seen in females as young as 15 years of age,

and incidence was found to increase with age, with peaks at 30–45 years and at 65–70 years [Table 6].

3) Colorectal cancerColorectal cancer is the third most common cancer in females and accounted for 5.9% of all incident

0

6

12

18

24

30

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Year

ASR

per 1

00 00

0 pop

ulatio

n

Figure 17: Age-standardized incidence rates (ASRs) for breast cancer in Omani women, 1996–2015.

0

2

4

6

8

10

12

14

16

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Year

ASR

per 1

00 00

0 pop

ulatio

n

Figure 18: Age-standardized incidence rates (ASRs)for thyroid cancer in Omani females, 1996–2015.

O M A N M E D J, V O l 3 4 , N O 4 , J U lY 2 0 1 9

386 Na jl a A . A l -l awat i , et a l . 387Na jl a A . A l -l awat i , et a l .

cancers in females with an average annual ASR of 7.3/100 000 female [Figure 19].

The trend of colorectal cancer incidence continued to rise steadily over the years; the lowest ASR (1/100 000) was reported in 1999 and the highest (10/100 000) in 2014 [Table 8]. Age-specific incidence among females begins in the 30–35 year age group and steadily rises to peak in the 50–60 year age group [Table 6].

4) Non-Hodgkin's lymphomaNHl is the fourth most common female cancer and accounted for 5.8% of all incident cancer cases in Omani females [Table 11]. The average annual ASR was 5.4/100 000 female [Table 6]. There was a gradual increase in the ASR from 1996 to 2015; the lowest ASR (3.1/100 000) was reported in 1996 and the highest (7.1/100 000) in 2015 [Table 8]. Age-specific incidence among females begins in the 30–35 year age group and gradually rises to peak in the 55–60 year age group [Table 6].

5) Leukemialeukemia is the fifth most common cancer in females and accounted for 5.8% of all incident cancers in females with an average annual ASR of 3.9/100 000 female [Table 6]. The trend of leukaemia incidence

has slowly increased over the years; the lowest ASR (2.8/100 000) was reported in 1996 and the highest (5.6/100 000) in 2003 [Table 8]. Age-specific incidence among females begins in the 0–10 year age group and gradually rises to peak in the 55–60 year and 70–75 age group [Table 6].

r efer ences

1. International Association of Cancer Registries. CanReg5: software for cancer registries [13 May 2019]. Available from: http://www.iacr.com.fr/index.php?option=com_content&view=category&layout=blog&id=68&Itemid=445.

2. Segi M. Cancer mortality for selected sites in 24 countries (1950-57). Department of Public Health, Tohuku University of Medicine. Nagoya: Japan; 1960.

3. Ministry of Health, Oman. Annaul Health Reports [7 May 2019]. Available from: https://www.moh.gov.om/en/web/statistics/annual-reports.

4. Ferlay J, Colombet M, Bray F. Cancer Incidence in Five Continents, CI5plus: IARC CancerBase No. 9 [13 May 2019]. Available from: http://ci5.iarc.fr/Default.aspx.

0

2

4

6

8

10

12

20152014201320122011201020092008200720062005200420032002200120001999199819971996

Year

ASR

per 1

00 00

0 pop

ulatio

n

Figure 19: Age-standardized incidence rates (ASRs) for colorectal cancer in Omani females.


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