+ All Categories
Home > Documents > Comparative Study on Breast Cancer

Comparative Study on Breast Cancer

Date post: 03-Jun-2018
Category:
Upload: jessica-woods
View: 225 times
Download: 0 times
Share this document with a friend

of 27

Transcript
  • 8/13/2019 Comparative Study on Breast Cancer

    1/27

    COMPARATIVE STUDY ON BREAST CANCER

    1Osuntokun O.T and

    2Ojo R.O

    1

    Department of Microbiology, Faculty of Science ,Adekunle Ajasin

    University,Akungba Akoko,Ondo State, Nigeria.

    2Department of Biological Science(Microbiology),College of Natural and Applied

    Science, Achievers University, Owo ,Ondo state, Nigeria

    Tel No-08063813636, 08056096672,08062484836

    [email protected],

    [email protected],[email protected]

    ABSTRACT

    This article presents a comprehensive review of the Breast Cancer literature

    examining epidemiology, diagnosis, pathology, benignbreast disease, breast

    carcinoma in situ syndromes, staging, and post-treatment surveillance among many

    topics. Breast cancer remains the most commonly occurring cancer in women in

    Ondo state using Owo local government as a case study.. Breast cancer detection,

    treatment, and prevention are prominent issues in public health and medical

    practice. Background information on developments in these arenas is provided so

    that Medical Microbiologist And Economics alike can continue to update their

    approach to the assessment of breast cancer risk to enhance productivity in the

    local government and Nigeria as whole.

    Introduction

    mailto:[email protected]:[email protected]:[email protected]
  • 8/13/2019 Comparative Study on Breast Cancer

    2/27

    Breast cancer was the form of cancer most often described in ancient documents.

    Because autopsies were rare, cancers of the internal organs were essentially invisible to

    ancient medicine. Breast cancer, however, could be felt through the skin, and in its

    advanced state often developed intofungating lesions:the tumor would becomenecrotic

    (die from the inside, causing the tumor to appear to break up) and ulcerate through the

    skin, weeping fetid, dark fluid.19

    The oldest description of cancer was discovered in Egypt and dates back to

    approximately 1600 BC. For centuries, physicians described similar cases in their

    practices, with the same conclusion. Ancient medicine, from the time of the Greeks

    through the 17th century, was based onhumoralism,and thus believed that breast cancer

    was generally caused by imbalances in the fundamental fluids that controlled the body,

    especially an excess ofblack bile 18

    Alternatively, patients often saw it as divine punishment, in the 18th century, a wide

    variety of medical explanations were proposed, including a lack of sexual activity, too

    much sexual activity, physical injuries to the breast, curdled breast milk, and various

    forms of lymphatic blockages, either internal or due to restrictive clothing. In the 19th

    century, the Scottish surgeon John Rodman said that fear of cancer caused cancer, and

    that this anxiety, learned by example from the mother, accounted for breast cancer's

    tendency to run in families.17

    Although breast cancer was known in ancient times, it was uncommon until the 19th

    century, when improvements in sanitation and control of deadly infectious diseases

    resulted in dramatic increases in lifespan. Previously, most women had died too young

    to have developed breast cancer. Additionally, early and frequent childbearing and

    breastfeeding probably reduced the rate of breast cancer development in those women

    who did survive to middle age

    http://wiki/Fungating_lesionhttp://wiki/Necrotichttp://wiki/Ulcer_(dermatology)http://wiki/Humoralismhttp://wiki/Black_bilehttp://wiki/Black_bilehttp://wiki/Humoralismhttp://wiki/Ulcer_(dermatology)http://wiki/Necrotichttp://wiki/Fungating_lesion
  • 8/13/2019 Comparative Study on Breast Cancer

    3/27

    Mastectomy for breast cancer was performed at least as early as AD 548, when it was

    proposed by the court physician Aetios of Amida to Theodora.It was not until doctors

    achieved greater understanding of the circulatory system in the 17th century that they

    could link breast cancer's spread to the lymph nodes in the armpit. The French surgeon

    Jean Louis Petit(16741750) and later the Scottish surgeon Benjamin Bell (17491806)

    were the first to remove the lymph nodes, breast tissue, and underlying chest muscle.44

    What is breast cancer?

    Cells in the body normally divide (reproduce) only when new cells are needed.

    Sometimes, cells in a part of the body grow and divide out of control, which creates a

    mass of tissue called a tumor. If the cells that are growing out of control are normal

    cells, the tumor is called benign (not cancerous). If, however, the cells that are growing

    out of control are abnormal and don't function like the body's normal cells, the tumor is

    called malignant (cancerous).

    Cancers are named after the part of the body from which they originate. Breast cancer

    originates in the breast tissue. Like other cancers, breast cancer can invade and grow into

    the tissue surrounding the breast. It can also travel to other parts of the body and form

    new tumors, a process called metastasis.

    Types of breast cancers

    There are many types of breast cancer, but some of them are very rare. Sometimes a

    breast tumor can be a mix of these types or a mixture of invasive and in situ cancer.

    1.Ductal carcinoma in situ (DCIS): This is a type of non-invasive breast cancer. DCIS

    means that the cancer cells are only in the ducts. They have not grown through the walls

    of the ducts into the tissue of the breast and so cannot spread to lymph nodes or other

  • 8/13/2019 Comparative Study on Breast Cancer

    4/27

    organs. Nearly all women with cancer at this stage can be cured. Mammograms find

    many cases of DCIS.

    2.Invasive (or infiltrating) ductal carcinoma (IDC): This is the most common breast

    cancer. It starts in a milk passage (a duct), breaks through the wall of the duct, and

    invades the tissue of the breast. From there it may be able to spread (metastasize) to

    other parts of the body. It accounts for about 8 out of 10 invasive breast cancers.

    3.Invasive (infiltrating) lobular carcinoma (ILC): This cancer starts in the milk

    glands (the lobules) and then spreads through the wall of the lobules. It can then

    spread(metastasize) to other parts of the body. About 1 in 10 invasive breast cancers are

    of this type.

    4.Inflammatory breast cancer (IBC): This uncommon type of invasive breast cancer

    accounts for about 1% to 3% of all breast cancers. Usually there is no single lump or

    tumor. Instead, IBC makes the skin of the breast look red and feel warm. It also may

    make the skin look thick and pitted, something like an orange peel. The breast may get

    bigger, hard, tender, or itchy.[12]

    PATHOLOGY OF BREAST CANCER

    Ninety-five percent of breast cancers are carcinomas, ie, they arise from breast epithelial

    elements. Breast cancers are divided into 2 major types, in situ carcinomas and invasive

    (or infiltrating) carcinomas. The in situ carcinomas may arise in either ductal or lobular

    epithelium, but remain confined there, with no invasion of the underlying basement

    membrane that would constitute extension beyond epithelial boundaries. As would be

    expected with such localized and confined malignancy,

    there is negligible potential for metastases. When there is extension of the ductal or

    lobular malignancy beyond the basement membrane that constitutes the epithelial

    border, then the malignancy is considered invasive (or infiltrating) ductal or lobular

    carcinoma. The potential for metastases and ultimately death occurs in invasive disease.

  • 8/13/2019 Comparative Study on Breast Cancer

    5/27

    Who gets breast cancer?

    Breast cancer is the most common cancer among women other than skin cancer. Breast

    cancer is the second-leading cause of cancer death in women after lung cancer, and it's

    the leading cause of cancer death among women ages 35 to 54. Only 5% to 10% of

    breast cancers occur in women with a clearly defined genetic predisposition for the

    disease. The majority of breast cancer cases are "sporadic," meaning there is no directfamily history of the disease. Increasing age is another risk factor for developing breast

    cancer.

    What are the warning signs of breast cancer?

    1.A lump or thickening in or near the breast or in the underarm that persists through the

    menstrual cycle

    30

    2. A mass or lump, which may feel as small as a pea 2

    3. A change in the size, shape, or contour of the breast25

    4. A blood-stained or clear fluid discharge from the nipple3

    5. A change in the look or feel of the skin on the breast or nipple (dimpled, puckered,

    scaly, or inflamed) .33

    6 .Redness of the skin on the breast or nipple1

    7. An area that is distinctly different from any other area on either breast

  • 8/13/2019 Comparative Study on Breast Cancer

    6/27

    8.A marble-like hardened area under the skin12

    These changes may be found when performing monthly breast self-exams. By

    performing breast self-exams, you can become familiar with the normal monthly

    changes in your breasts.

    Breast self-examination should be performed at the same time each month, three to five

    days after your menstrual period ends. If you have stopped menstruating, perform the

    exam on the same day of each month.

    What are the stages of breast cancer?

    Stage 0breast cancer is when the disease is localized to the milk ducts (carcinoma in

    situ).

    Stage I breast cancer: The cancer is smaller than 1-inch across and hasn't spread

    anywhere.

    Stage IIbreast cancer is one of the following:

    The tumor is less than an inch across but has spread to the underarm lymph nodes(IIA); or

    The tumor is between 1 and 2 inches (with or without spread to the lymph nodes);or

    The tumor is larger than 2 inches and has not spread to the lymph nodes under thearm (both IIB).

    Advanced breast cancer (metastatic) results after cancer cells spread to the lymph nodes

    and to other parts of the body.

  • 8/13/2019 Comparative Study on Breast Cancer

    7/27

  • 8/13/2019 Comparative Study on Breast Cancer

    8/27

    Radial scars are benign breast lesions of uncertain pathogenesis, which are usually

    discovered incidentally when a breast mass is removed for other reasons. Radial scars

    are characterized by a fibroelastic core from which ducts and lobules radiate.11

    Atypical hyperplasia of either ductal or lobular cells, where the cells are uniform but

    have lost their apical-basal cellular orientation, confers a 4-fold increased risk unless

    there is also a family history of 1 or more first-degree relatives with breast cancer, where

    the risk increases to 6-foldsine kinase activity. Women with atypical hyperplasia with

    over-expression of HER-2/neu have a greater than 7-fold increased risk of developing

    invasive breast carcinoma, as compared with women with non-proliferative benign

    breast lesions and no evidence of HER-2/neu amplification,13

    Nipple discharge is often of concern to women and their physicians as a sign of

    malignancy, but the reality is that non-bloody nipple discharge and bilateral nipple

    discharge are usually of benign causation. Women with papillomas often have bloody

    discharge. Nipple discharge is uncommon in invasive breast cancer and if present is

    invariably unilateral and is usually associated with a palpable mass.8

    Breast pain is an uncommon presentation of breast cancer. In a study of 987 women

    referred for breast imaging because of breast pain alone, only 4 women (0.4%) were

    found to have invasive breast cancer, a number that was not different from a control

    asymptomatic group.9

    RELATIONSHIP OF BENIGN BREAST DISEASE WITH BREAST

    CANCER

    Breast biopsies -conferring no significantly increased risk for malignancy include any

    lesion with non-proliferative change5.20 These include duct ectasia and simple

    fibroadenomas, benign solid tumors containing glandular as well as fibrous tissue. The

    latter is usually single but may be multiple.

  • 8/13/2019 Comparative Study on Breast Cancer

    9/27

    Solitary papillomas are also benign lesions conferring no increased risk of future

    malignancy, despite the fact that they are often7with sanguineous or serosanguineous

    nipple discharge.

    Fibrocystic-change (cysts and/or fibrous tissue without symptoms) or fibrocystic

    disease (fibrocysticchanges occurring in conjunction with pain, nipple discharge, or a

    degree of lumpiness sufficient to cause suspicion of cancer) does not carry increased risk

    for cancer (other than the potential for missing a malignant mass).

    Some clinicians differentiate fibrocystic change or disease into those of hyperplasia,

    adenosis, and cystic change becauseof their differentiation into age distributions.

    Hyperplasia characteristicallyoccurs in womenin their 20s, often with upper outer

    quadrant breast pain and an indurated axillary tail, as a result of stromal

    proliferation.

    Women in their 30s present with solitary or multiple breast nodules 210 mm in

    size, as a result of proliferation of glandular cells.

    Women in their 30s and 40s present with solitary or multiple cysts. Acute enlargement

    of cysts may cause pain, and because breast ducts are usually patent, nipple discharge is

    common with the discharge varying in color from pale green to brown.28

    How is breast cancer diagnosed?

    During your regular physical examination, your doctor will take a thorough personal and

    family medical history. He or she will also perform and/or order one or more of the

    following:

    1.Breast examination:During the breast exam, the doctor will carefully feel the lump

    and the tissue around it. Breast cancer usually feels different (in size, texture, and

    movement) than benign lumps.

  • 8/13/2019 Comparative Study on Breast Cancer

    10/27

    2.Mammography:An X-ray test of the breast can give important information about a

    breast lump.

    3.Digital mammography: A technique in which an X-ray image of the breast is

    digitally recorded into a computer rather than on a film. This may be better for women

    with dense breasts.

    4.Ultrasonography:This test uses sound waves to detect the character of a breast lump

    -- whether it is a fluid-filled cyst (not cancerous) or a solid mass (which may or may not

    be cancerous). This may be performed along with the mammogram. 15

    Based on the results of these tests, your doctor may or may not request a biopsy test to

    get a sample of the breast mass cells or tissue. Biopsies are performed using surgery or

    needles.

    1.After the sample is removed, it is sent to a lab for testing. A pathologist -- a doctor

    who specializes in diagnosing abnormal tissue changes -- views the sample under a

    microscope and looks for abnormal cell shapes or growth patterns. When cancer is

    present, the pathologist can tell what kind of cancer it is (ductal or lobular carcinoma)

    and whether it has spread beyond the ducts or lobules (invasive).

    2.Laboratory tests, such as hormone receptor tests (estrogen and progesterone) and

    human epidermal growth factor receptor (HER2/neu), can show whether hormones or

    growth factors are helping the cancer grow. If the test results show that they are (a

    positive test), the cancer is likely to respond to hormonal treatment or antibody

    treatment.10 These therapies deprive the cancer of the estrogen hormone or use a

    monoclonal antibody known as herceptin to treat the cancer.

  • 8/13/2019 Comparative Study on Breast Cancer

    11/27

    3.Breast cancer diagnosis and treatment are best accomplished by a team of experts

    working together with the patient. Each patient needs to evaluate the advantages and

    limitations of each type of treatment and work with her team of physicians to develop

    the best approach.

    Other diagnostic tests

    Other methods being investigated include:

    1.Scintimammography: A technique in which radioactive contrast agents are injected

    into a vein in the arm. An image of the breast is taken with a special camera, which

    detects the radiation (gamma rays) emitted by the dye. Tumor cells, which contain more

    blood vessels than benign tissue, collect more of the dye and project a brighter image.

    2.Positron emission tomography (PET) scanning:A technique that measures a signal

    from injected radioactive tracers that migrate to the rapidly dividing cancer cells. The

    PET scanner picks up the signal and creates an image.

    3.Magnetic resonance imaging (MRI): A test that produces very clear pictures, or

    images, of the human body without the use of X-rays. MRI uses a large magnet, radio

    waves, and a computer to produce these images.

    4.Scientists are also exploring ways to detect breast cancer or markers of cancer in the

    blood, urine, and in fluid taken from the nipple.5

    How is breast cancer treated?

    If the tests find cancer, you and your doctor will develop a treatment plan to eradicate

    the breast cancer, to reduce the chance of cancer returning in the breast, as well as to

  • 8/13/2019 Comparative Study on Breast Cancer

    12/27

    reduce the chance of the cancer traveling to a location outside of the breast. Treatment

    generally follows within a few weeks after the diagnosis.

    The type of treatment recommended will depend on the size and location of the tumor in

    the breast, the results of lab tests done on the cancer cells, and the stage, or extent, of the

    disease. Your doctor will usually consider your age and general health as well as your

    feelings about the treatment options.

    Breast cancer treatments are local or systemic. Local treatments are used to remove,

    destroy, or control the cancer cells in a specific area, such as the breast. Surgery and

    radiation treatment are local treatments. Systemic treatments are used to destroy orcontrol cancer cells all over the body. Chemotherapy and hormone therapy are systemic

    treatments. A patient may have just one form of treatment or a combination, depending

    on her needs.

    Surgery: Breast conservation surgery involves removing the cancerous portion of the

    breast and an area of normal tissue surrounding the cancer, while striving to preserve the

    normal appearance of the breast. This procedure has often been called a lumpectomy,

    which is a partial mastectomy. Some of the lymph nodes under the arm are also

    removed. Usually, six weeks of radiation therapy is then used to treat the remaining

    breast tissue. Most women who have a small, early-stage tumor are excellent candidates

    for this approach.16

    What happens after treatment?

    Following local breast cancer treatment, the treatment team will determine the likelihood

    that the cancer will recur outside the breast. This team usually includes a medical

    oncologist, a specialist trained in using medicines to treat breast cancer. The medical

    oncologist, who works with the surgeon, may advise the use of the drugs like tamoxifen

  • 8/13/2019 Comparative Study on Breast Cancer

    13/27

    or anastrozole (ARIMIDEX) or possibly chemotherapy. These treatments are used in

    addition to, but not in place of, local breast cancer treatment with surgery and/or

    radiation therapy.19

    How can I protect myself from breast cancer?

    Follow these three steps for early detection:

    1.Get a mammogram.The American Cancer Society recommends having a baseline

    mammogram at age 35, and a screening mammogram every year after age 40.

    Mammograms are an important part of your health history. Recently, the US Preventive

    Services Task Force (USPTF) came out with new recommendations regarding when and

    how often one should have mammograms. These include starting at age 50 and having

    them every two years. We do not agree with this, but we are in agreement with the

    American Cancer Society and have not changed our guidelines, which recommend

    yearly mammograms starting at age 40.

    2.Examine your breasts each month after age 20.You will become familiar with the

    contours and feel of your breasts and will be more alert to changes.

    3.Have your breast examined by a healthcareprovider at least once every three years

    after age 20, and every year after age 40. Clinical breast exams can detect lumps that

    may not be detected by mammogram.

    20

    Survival rates for breast cancer

    Some people with cancer may want to know the survival rates for their type of cancer.

    Others may not find the numbers helpful, or may even not want to know them. Whether

  • 8/13/2019 Comparative Study on Breast Cancer

    14/27

    or not you want to read about survival rates is up to you. If you decide that you do not

    want to read about them, skip to the next section.

    The 5-year survival rate refers to the percentage of patients who live at least 5 years after

    their cancer is found. Of course, many people live much longer than 5 years. Also,

    people with cancer can die from other things, and these numbers do not take into account

    the fact that some of the deaths are from causes other than breast cancer. These numbers

    are based on women treated a number of years ago. Because we now find more cancers

    early and use newer, better treatments, the survival rates are getting better all the time.

    Risk factors for breast cancer

    1. Lifestyle

    1.Smoking- tobacco appears to increase the risk of breast cancer with the greater the

    amount of smoked and the earlier in life smoking began the higher the risk. [23]In those

    who are long term smokers the risk is increased 35% to 50%.14 A lack of physical

    activity has been linked to ~10% of cases.22

    2.Breast feeding.-The association between breast feeding and breast cancer has not been

    clearly determined with some studies finding support for an association and others not.

    3.Abortion-breast cancer hypothesis -In the 1980s the abortionbreast cancer hypothesis

    posited that induced abortion increased the risk of developing breast cancer.[26

    4.Miscarriages nor abortions-This hypothesis has been the subject of extensive scientific

    inquiry which has concluded that neither miscarriages nor abortions are associated.[6]

    5Oral contraceptives .-There may be an association between oral contraceptives and the

    development of premenopausal breast cancer.26

    6.Not breastfeeding: Some studies have shown that breastfeeding slightly lowers breast

    http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25http://c/Documents%20and%20Settings/user/My%20Documents/Breast%20cancer/Breast_cancer.htm%23cite_note-25
  • 8/13/2019 Comparative Study on Breast Cancer

    15/27

    cancer risk, especially if the breastfeeding lasts 1 to 2 years. This could be because

    breastfeeding lowers a womans total number of menstrual periods, as does pregnancy.

    But this has been hard to study because, in countries such as the United States,

    breastfeeding for this long is uncommon.29

    7.Being overweight or obese: Being overweight or obese after menopause (or because

    of weight gain that took place as an adult) is linked to a higher risk of breast cancer. But

    the link between weight and breast cancer risk is complex. The risk seems to be higher if

    theextra fat is around the waist.

    8.Lack of exercise: Studies show that exercise reduces breast cancer risk. The only

    question is how much exercise is needed. One study found that as little as 1 hour and 15

    minutes to 2 hours of brisk walking per week reduced the risk by 18%. Walking 10

    hours a week reduced the risk a little more.

    Risk factors you cannot change

    1.Gender: Being a woman is the main risk for breast cancer. While men also get the

    disease, it is about 100 times more common in women than in men.

    2.Age: The chance of getting breast cancer goes up as a woman gets older. About 2 of 3

    women with invasive breast cancer are 55 or older when the cancer is found.

    3.Genetic risk factors: About 5% to 10% of breast cancers are thought to be linked to

    inherited changes (mutations) in certain genes. The most common changes are those of

    the BRCA1 and BRCA2 genes. Women with these gene changes have up to an

    80%chance of getting breast cancer during their lifetimes. Other gene changes may raise

    breast cancer risk, too.

    4.Family history: Breast cancer risk is higher among women whose close blood

    relatives have this disease. The relatives can be from either the mothers or fathers side

    of the family. Having a mother, sister, or daughter with breast cancer about doubles a

  • 8/13/2019 Comparative Study on Breast Cancer

    16/27

    womans risk. Its important to notethat most (over 85%) women who get breast cancer

    do nothave a family history of this disease, so not having a relative with breast cancer

    doesnt mean you wont get it.

    5.Personal history of breast cancer: A woman with cancer in one breast has a greater

    chance of getting a new cancer in the other breast or in another part of the same breast.

    This is different from a return of the first cancer (called a recurrence).

    6.Race: Overall, white women are slightly more likely to get breast cancer than African-

    American women. African American women, though, are more likely to die of breast

    cancer. And in women under 45 years of age, breast cancer is more common in African

    American women. Asian, Hispanic, and Native-American women have a lower risk of

    getting and dying from breast cancer.

    7.Dense breast tissue: Dense breast tissue means there is more gland tissue and less

    fatty tissue. Women with denser breast tissue have a higher risk of breast cancer. Dense

    breast tissue can also make it harder for doctors to spot problems on mammograms.

    8.Certain benign (not cancer) breast problems: Women who have certain benign

    breast changes may have an increased risk of breast cancer. Some of these are more

    closely linked to breast cancer risk than others. For more details about these, see our

    document,

    9.Non-cancerous Breast Conditions.

    Lobular carcinoma in situ: In this condition, cells that look like cancer cells are in the

    milk-making glands (lobules), but they do not grow through the wall of the lobules and

    cannot spread to other parts of the body. It is not a true cancer or pre-cancer, but having

    LCIS increases a woman's risk of getting cancer in either breast later. For this reason, it's

    important that women with LCIS make sure they have regular mammograms and doctor

    visits. Women with lobular carcinoma in situ (LCIS) have a 7 to 11 times greater risk of

    developing cancer in either breast.

  • 8/13/2019 Comparative Study on Breast Cancer

    17/27

    10.Menstrual periods: Women who began having periods early (before age 12) or who

    went through the change of life (menopause) after the age of 55 have a slightly increased

    risk of breast cancer. The increase in risk may be due to a longer lifetime exposure to the

    hormones estrogen and progesterone.

    11.Breast radiation early in life: Women who have had radiation treatment to the chest

    area (as treatment for another cancer) earlier in life have a greatly increased risk of

    breast cancer. The risk varies with the patients age when she had radiation. The risk

    from chest radiation is highest if the radiation were given during the teens, when the

    breasts were still developing. Radiation treatment after age 40 does not seem to increase

    breast cancer risk.

    12.Treatment with DES: In the past, some pregnant women were given the drug DES

    (diethylstilbestrol) because it was thought to lower their chances of losing the baby

    (miscarriage). Studies have shown that these women have a slightly increased risk of

    getting breast cancer. The effect on the children exposed in the womb is less clear, but

    they may also have a slightly higher risk of breast cancer

    Management and Medication of Breast Cancer

    Drugs used after and in addition to surgery are called adjuvant therapy. Chemotherapy or

    other types of therapy prior to surgery are called neoadjuvant therapy.

    There are currently three main groups of medications used for adjuvant breast cancer

    treatment: hormone blocking therapy, chemotherapy, and monoclonal antibodies.

    Hormone blocking therapy

    Some breast cancers require estrogen to continue growing. They can be identified by the

    presence of estrogen receptors (ER+) and progesterone receptors (PR+) on their surface

    (sometimes referred to together as hormone receptors). These ER+ cancers can be

  • 8/13/2019 Comparative Study on Breast Cancer

    18/27

    treated with drugs that either block the receptors, e.g. tamoxifen (Nolvadex), or

    alternatively block the production of estrogen with an aromatase inhibitor, e.g.

    anastrozole (Arimidex)34 or letrozole(Femara). Aromatase inhibitors, however, are only

    suitable for post-menopausal patients. This is because the active aromatase in

    postmenopausal women is different from the prevalent form in premenopausal women,

    and therefore these agents are ineffective in inhibiting the predominant aromatase of

    premenopausal women

    Chemotherapy

    Predominately used for stage 24 disease, being particularly beneficial in estrogen

    receptor-negative (ER-) disease. They are given in combinations, usually for 36

    months. One of the most common treatments is cyclophosphamide plus doxorubicin

    (Adriamycin), known as AC. Most chemotherapy medications work by destroying fast-

    growing and/or fast-replicating cancer cells either by causing DNA damage upon

    replication or other mechanisms; these drugs also damage fast-growing normal cells

    where they cause serious side effects. Damage to the heart muscle is the most dangerous

    complication of doxorubicin. Sometimes a taxane drug, such as docetaxel, is added, and

    the regime is then known as CAT; taxane attacks the microtubules in cancer cells.

    Another common treatment, which produces equivalent results, is cyclophosphamide,

    methotrexate, and fluorouracil (CMF). (Chemotherapy can literally refer to any drug, but

    it is usually used to refer to traditional non-hormone treatments for cancer.15

    Radiation

    Radiationis given after surgery to the region of the tumor bed and regional lymph nodes,to destroy microscopic tumor cells that may have escaped surgery. It may also have a

    beneficial effect on tumor microenvironment.38

    http://wiki/Aromatase_inhibitorhttp://wiki/Aromatase_inhibitorhttp://wiki/Aromatase_inhibitor
  • 8/13/2019 Comparative Study on Breast Cancer

    19/27

    Radiation therapy can be delivered as external beam radiotherapyor as brachytherapy

    (internal radiotherapy). Conventionally radiotherapy is given after the operation for

    breast cancer. Radiation can also be given at the time of operation on the breast cancer-

    intra operatively. The largest randomized trial to test this approach was the TAR-GIT-A

    Trial.21

    Radiation which found that targeted intraoperative radiotherapy was equally effective at

    4-years as the usual several weeks' of whole breast external beam radiotherapy.

    Radiation can reduce the risk of recurrence by 5066% (1/2 2/3 reduction of risk)

    when delivered in the correct dose and is considered essential when breast cancer is

    treated by removing only the lump (Lumpectomy or Wide local excision).

    Can breast cancer be prevented?

    There is no sure way to prevent breast cancer. But there are things all women can do that

    might reduce their risk and help increase the odds that if cancer does occur, it is found at

    an early, more treatable stage.

    Lowering your risk: You can lower your risk of breast cancer by changing those risk

    factors that are under your control. Body weight, physical activity, and diet have all been

    linked to breast cancer, so these might be areas where you can take action. At this time,

    the best advice about diet and activity to possibly reduce the risk of breast cancer is to:

    1.Get regular physical activity.

    2.Reduce your lifetime weight gain by eating fewer calories and getting regular

    exercise.

    3.Avoid or limit your alcohol intake.

    To find out more, see our document, American Cancer Society Guidelines on Nutrition

    and Physical Activity for Cancer Prevention.

    Women who choose to breastfeed for at least several months may also reduce their

    breast cancer risk. Not using hormone therapy after menopause can also help you avoid

  • 8/13/2019 Comparative Study on Breast Cancer

    20/27

    raising your risk. It's not clear at this time whether chemicals that have estrogen-like

    properties (like those found in some plastic bottles or certain cosmetics and personal

    care products) increase breast cancer risk. If there is an increased risk, it is likely to be

    very small. Still, women who are concerned may choose to avoid products that contain

    these substances when they can3.

    Finding breast cancer early: It is also important for women to follow the American

    Cancer Societys guidelines for finding breast cancer early.

    Society and culture belief/Effect of breast cancer

    Before the 20th century, breast cancer was feared and discussed in hushed tones, as if itwere shameful. As little could be safely done with primitive surgical techniques, women

    tended to suffer silently rather than seeking care. When surgery advanced, and long-term

    survival rates improved, women began raising awareness of the disease and the

    possibility of successful treatment. The "Women's Field Army", run by the American

    Society for the Control of Cancer (later the American Cancer Society) during the 1930s

    and 1940s was one of the first organized campaigns. In 1952, the first peer-to-peer

    support group, called "Reach to Recovery", began providing post-mastectomy, in-

    hospital visits from women who had survived breast cancer.43

    The breast cancer movement of the 1980s and 1990s developed out of the larger feminist

    movements and women's health movement of the 20th century. This series of political

    and educational campaigns, partly inspired by the politically and socially effective AIDS

    awareness campaigns, resulted in the widespread acceptance of second opinions before

    surgery, less invasive surgical procedures, support groups, and other advances in patient

    care

    Breast cancer culture

  • 8/13/2019 Comparative Study on Breast Cancer

    21/27

    Breast cancer culture, or pink ribbon culture, is the set of activities, attitudes, and values

    that surround and shape breast cancer in public. The dominant values are selflessness,

    cheerfulness, unity, and optimism. Appearing to have suffered bravely is the passport

    into the culture.

    The woman with breast cancer is given a cultural template that constrains her emotional

    and social responses into a socially acceptable discourse: She is to use the emotional

    trauma of being diagnosed with breast cancer and the suffering of extended treatment to

    transform herself into a stronger, happier and more sensitive person who is grateful for

    the opportunity to become a better person. Breast cancer thereby becomes a rite of

    passage rather than a disease.4

    To fit into this mold, the woman with breast cancer needs to normalize and feminize her

    appearance, and minimize the disruption that her health issues cause anyone else. Anger,

    sadness and negativity must be silenced.

    he primary purposes or goals of breast cancer culture are to maintain breast cancer's

    dominance as the preminent women's health issue, to promote the appearance that

    society is "doing something" effective about breast cancer, and to sustain and expand the

    social, political, and financial power of breast cancer activists.43

    Reference

    1.Albertini J, Lyman G, Cox C, et al. Lymphatic mapping and sentinel node biopsy in

    the patient with breast cancer.JAMA. 1996;276:18181822.

    2. American Cancer Society (2007). "Cancer Facts & Figures 2007" (PDF). Archived

    from the original on 10 April 2007. Retrieved 2007-04-26

  • 8/13/2019 Comparative Study on Breast Cancer

    22/27

    3. Alfredo Morabia (2004). A History of Epidemiologic Methods and ConceptsBoston:

    Birkhauser. pp. 301302. ISBN 3-7643-6818-7. Retrieved 2007-12-31.

    4. . American Cancer Society (2005). "Breast Cancer Facts & Figures 20052006"

    (PDF). Archived from the original on 13 June 2007. Retrieved 2007-04-26.

    5, Bassett L, Winchester D, Caplan R, et al. Stereotactic core needle biopsy of the breast:

    A report of the Joint Task Force of the American College of Radiology,

    American College of Surgeons, and College of American Pathologists. CA

    Cancer JClin. 1997:47:171.

    6. Beral, V; Bull, D; Doll, R; Peto, R; Reeves, G; Collaborative Group on Hormonal

    Factors in Breast, Cancer (27 March 2004). "Breast cancer and abortion:

    collaborative reanalysis of data from 53 epidemiological studies, including

    83000 women with breast cancer from 16 countries.". Lancet363(9414):

    100716. Doi :10.1016/S0140- 6736(04)15835-2. PMID 15051280.

    7. Dupont W, Page D. Risk factors for breast cancer in women with proliferative breast

    disease.N EnglJ Med. 1985;312:146151.

    8. .Donegan W. Diagnosis. In: Donegan W, Spratt J,eds. Cancer of the Breast.

    Philadelphia, PA: WB Saunders; 1995:157.

    9 Duijan L, Guit G, Hendriks J, et al. Value of breast imaging in women with painful

    breasts: observational follow-up study.BMJ. 1998:317:1492.

    10. Donegan W. Evaluation of a palpable breast mass. N Engl J Med. 1992;327:937

    942.

    11. Fiorica J. Fibrocystic changes. Obstet Gynecol Clin North Am. 1994:21:445.

    12. . Jacobs TW, Byrne C, Colditz G, et al. Radical scars in benign breast biopsy

    specimens and the risk of breast cancer.N Engl J Med. 1999;340:430.

  • 8/13/2019 Comparative Study on Breast Cancer

    23/27

    13. Stark A, Hulka BS, Joens S, et al. HER-2/neu amplification in benign breast disease

    and the risk of subsequent breast cancer.J Clin Oncol. 2000;18:267.

    14. Johnson KC, Miller, AB, Collishaw, NE, Palmer, JR, Hammond, SK, Salmon, AG,

    Cantor, KP, Miller, MD, Boyd, NF, Millar, J, Turcotte, F (Jan 2011).

    "Active smoking and secondhand smoke increase breast cancer risk: the

    report of the Canadian Expert Panel on Tobacco Smoke and Breast Cancer

    Risk (2009).". Tobacco control20 (1): e2. doi:10.1136/tc.2010.035931.

    PMID 21148114.

    15.Jahanzeb M (August 2008). "Adjuvant trastuzumab therapy for HER2-positive breast

    cancer". Clin. Breast Cancer8(4): 32433. doi:10.3816/CBC.2008.n.037.

    PMID 18757259.

    16. .Harris J, Lippman M, Veronesi U, et al. Breast Cancer(3 parts). N Engl J Med.

    1992:327:319479.2. From the Centers for Disease Control and Prevention:

    Breast Cancer Incidence and MortalityUnited States 1992.JAMA.

    1996;276:1293.

    17.History of Breast Cancer". Random History. 27 February 2008. Retrieved 2010-05-0

    18."The History of Cancer".American Cancer Society. 25 March 2002. Retrieved 2006-

    10-09.

    19. . lson, James Stuart (2002).Bathsheba's breast: women, cancer & history.

    Baltimore: The Johns Hopkins University Press. pp. 913. ISBN0-8018

    -6936-6.

    20. Pike M, Spicer D, Dahmoush L, Press M. Estrogens, progesterones, normal breast

    cell proliferation and breast cancer risk.Epidemiol Rev. 1993;15:17.

    http://wiki/International_Standard_Book_Numberhttp://wiki/International_Standard_Book_Numberhttp://wiki/International_Standard_Book_Number
  • 8/13/2019 Comparative Study on Breast Cancer

    24/27

    21. . Petit T, Dufour P, Tannock I (June 2011). "A critical evaluation of the role of

    aromatase inhibitors as adjuvant therapy for postmenopausal women with

    breast cancer". Endocr. Relat. Cancer 18 (3): R7989. doi:10.1530/ERC-

    10-0162. PMID 21502311.

    22. . Lee, I-Min; Shiroma, Eric J; Lobelo, Felipe; Puska, Pekka; Blair, Steven N;

    Katzmarzyk, Peter T (1 July 2012). "Effect of physical inactivity on major

    non- communicable diseases worldwide: an analysis of burden of disease

    and life expectancy". The Lancet380(9838): 21929. doi:10.1016/S0140-

    6736(12)61031- 9. PMID 22818936

    23. Russo J, Russo I (1980). "Susceptibility of the mammary gland to carcinogenesis. II.

    Pregnancy interruption as a risk factor in tumor incidence". Am J Pathol100(2):

    505 506. PMC1903536. PMID 6773421. "In contrast, abortion is associated

    with increased risk of carcinomas of the breast. The explanation for these

    epidemiologic findings is not known, but the parallelism between the DMBA-

    induced rat mammary carcinoma model and the human situation is striking.[...] Abortion would interrupt this process, leaving in the gland

    undifferentiated structures like those observed in the rat mammary

    gland, which could render the gland again susceptible to carcinogenesis."

    24. . Gobbi H, Dupont W, Simpson JF, et al. Transforming growth factor-beta and breast

    cancer risk in women with mammary epithelial hyperplasia. JNatl Cancer Inst.

    1999;91:2096.

    25. Shapira D, Urban N. A minimalist policy for breast cancer Surveillance. JAMA.

    1991;265:380382.

  • 8/13/2019 Comparative Study on Breast Cancer

    25/27

    26. Smith R, von Eschenbach A, Wender R, et al. American Cancer Society Guidelines

    for the early detection of cancer. CACancer J. Clin. 2001;51:3875.

    27. Veljkovi M, Veljkovi, S (Sep 2010). "[The risk of breast cervical, endometrial and

    ovarian cancer in oral contraceptive users].". Medicinski pregled63(910): 657

    61.PMID21446095.

    28. Woods E, Helvie M, Ikeda D, et al. Solitary breast papilloma: comparison of

    mammographic, galacytographic, and pathologic findings.Am J Roentgenol.

    1992;159:487

    29. Watson M (2008). "Assessment of suspected cancer".InnoAiT1(2): 94107. .

    30.Kahlenborn C, Modugno, F, Potter, DM, Severs, WB (Oct 2006). "Oral contraceptive

    use as a risk factor for premenopausal breast cancer: a meta-an alysis.". Mayo

    Clinic proceedings. Mayo Clinic 81 (10): 1290302. doi:10.4065/81.10.1290

    PMID 17036554.

    31.Kahlenborn C, Modugno, F, Potter, DM, Severs, WB (Oct 2006). "Oral contraceptive

    use as a risk factor for premenopausal breast cancer: a meta-analysis.". Mayo

    Clinic proceedings. Mayo Clinic81(10): 1290302.

    32.McKay M, Langlands A. Prognostic Factors inBreast Cancer (Letter).N Engl J Med.

    1992:327: 13171318.

    33.Malone KE, Daling JR, Thompson JD, OBrien CA, Francisco LV, Ostrander EA.

    BRCA1 mutations and breast cancer in the general population: analysis in

    women before age 35 years and in women before age 45 years with first-degree

    family history.JAMA. 1998;279:922929.

    34.Merck Manual of Diagnosis and Therapy (February 2003). "Breast Disorders: Breast

    Cancer". Retrieved 2008-02-05.

    http://www.ncbi.nlm.nih.gov/pubmed/21446095http://www.ncbi.nlm.nih.gov/pubmed/21446095http://www.ncbi.nlm.nih.gov/pubmed/21446095http://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://www.ncbi.nlm.nih.gov/pubmed/21446095
  • 8/13/2019 Comparative Study on Breast Cancer

    26/27

    35.Medicine(23 August, 2006)."Breast Cancer Evaluation". Retrieved 2008-02-05.

    36.Massarut S, Baldassare G, Belleti B, Reccanello S, D'Andrea S, Ezio C, Perin T,

    Roncadin M, Vaidya JS (2006). "Intraoperative radiotherapy impairs breast cancer

    cell motility induced by surgical wound fluid".J Clin Oncol24(18S): 10611.

    36. Krag D, Weaver D, Ashikaga T, et al. The sentinel node in breast cancerA

    multicenter study.NEngl J Med. 1998;339:941.

    37. Yang, L; Jacobsen, KH (December 2008). "A systematic review of the association

    between breastfeeding and breast cancer.". Journal of women's health (2002)17

    (10): 163545.doi:10.1089/jwh.2008.0917. PMID 1904935

    38.Yalom, Marilyn (1997).A history of the breast. New York: Alfred A. Knopf. p. 234.

    ISBN 0-679-43459-3.

    39.Goldhirsch A, Ingle JN, Gelber RD, Coates AS, Thrlimann B, Senn HJ (August

    2009). "Thresholds for therapies: highlights of the St Gallen International Expert

    Consensus on the primary therapy of early breast cancer 2009". Ann. Oncol.20

    (8): 131929.doi:10.1093/annonc/mdp322. PMC 2720818. PMID 19535820.

    40. Goldhirsch A, Ingle JN, Gelber RD, Coates AS, Thrlimann B, Senn HJ (August

    2009). "Thresholds for therapies: highlights of the St Gallen International Expert

    Consensus on the primary therapy of early breast cancer 2009". Ann. Oncol.20

    (8): 131929.doi:10.1093/annonc/mdp322. PMC 2720818. PMID 19535820.

    http://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifierhttp://wiki/Digital_object_identifier
  • 8/13/2019 Comparative Study on Breast Cancer

    27/27


Recommended