Benign epithelial tumors/prosthodontic courses

BENIGN TUMORS OF THE EPITHELIAL TISSUE ORIGIN

INDIAN DENTAL ACADEMYLeader in continuing Dental Education

www.indiandetalacademy.com

OBJECTIVES

At the end of the lecture student should be able to-

-Describe classification, incidence, etiology, clinical features, histopathological features of papilloma– Describe classification, incidence, etiology, clinical features, histopathological features of squamous acanthoma–Describe classification, incidence, etiology, clinical features, histopathological features of keratoacanthoma


PAPILLOMA CLINICAL FEATURES

Common benign neoplasm originating from surface epithelium

Exophytic growth made of finger like projections

Roughened, Verrucous or cauliflower like appearance

Well circumscribed, pedunculated, Found on tongue, lips, buccal mucosa,

gingiva & palate Few mms in diameter to several cms



Verruca vulgaris is a tumor of skin analogo us to oral papillomaPebbly lesions are seen in multiple hamartomas & hamartoma and neoplasia syndrome (cowdens syndrome).

It is an autosomal dominant disease characterized by facial trichilemomas asso. With gastrointestinal tract, thyroid, CNS & mucocutaneous abnormalities as well as oral lesions


Multiple papllilomas are seen in focal dermal hypoplasia syndrome


HISTOLOGIC FEATURES Long thin finger like projections

extending above the surface of mucosa

Continuous layer of str.sq. epithelium

Thin central conn. tissue core supports nutrients blood vessels

Proliferation of spinous layer in pappillary fashion

Conn. tissue not considered a part of neoplastic element

Chr. inflammatory cells persent Mitosis sometimes present www.indiandetalacademy.com

Treatment

-Excision through the pedicle

Mature stratified squamous epithelium


SQAUMOUS ACANTHOMA

Uncommon lesion Reactive phenomenon of epithelium Occurs on any site of the oral mucosa Usually in older adults small, flat or elevated, white, sessile or pedunculated

lesion on the mucosa Epithelial proliferation of markedly thickened layer of

orthokeratin & underlying spinous layer of the cells Recur after excision


KERATOACANTHOMA(self-healing carcinoma,molluscum

psuedocarcinomatum,molluscum sebaceum, verrucoma)

Resembles epidermoid carcinoma

Etiology genetic & viral factors


Clinical features

Twice frequently seen in men 50-70yrs 8.1% seen on lips Lesion appears as elevated & umbilicated or

crateriform with a depressed central core or plug Painful/ lympahadenopathy +nt


Begins as small, firm nodule

Develops to full size in 4- 8 weeks

Histological features Hyperplastic sq. epith

growing into underlying conn tissue

Thickened layer of para or orthokeratin wit central plugging

Central keratin plug


•Epithelium occasionally dysplastic

•At the margins normal adjacent epithelium is elevated towards the central portion of the crater

Treatment•surgical excision


Summary slide

Classification Incidence etiology Clinical features Histological features

of papilloma, squamous acanthoma, & keratoacanthoma.



THANK YOU !


Date post:	23-Jan-2018
Category:	Education
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