All Free Oral Pathology and Medicine MCQs with Answers

• A. Stage IV
• B. Stage II
• C. Stage III
• D. Stage I

Explanation: A retromolar trigone carcinoma invading the mandible or deep muscles such as the medial pterygoid is locally advanced T4 disease.

• A. anterior third
• B. posterior third
• C. middle third
• D. lateral margin

Explanation: The posterior third of the tongue has rich access to deeper lymphatic and vascular channels, so carcinomas there have a greater tendency…

• A. Parakeratosis
• B. Hyperkeratosis
• C. Dyskeratosis
• D. Acanthosis

Explanation: Dyskeratosis means abnormal, premature keratinization of individual epithelial cells and is a feature of epithelial dysplasia, which may…

• A. Smooth muscles
• B. Reticuloendothelial system
• C. Striated muscles
• D. Blood vessels

Explanation: Kaposi sarcoma is a malignant vascular neoplasm derived from endothelial cells, producing spindle cells and slit-like vascular spaces.

• A. Squamous cell carcinoma
• B. Transitional cell carcinoma
• C. Melanoma
• D. Basal cell carcinoma

Explanation: Squamous cell carcinoma is by far the most common malignant epithelial tumour of the oral cavity, arising from the stratified squamous…

• A. Epstein-Barr virus
• B. Herpes simplex virus type I
• C. HTLV 1
• D. Papilloma virus

Explanation: EBV, HTLV-1 and human papillomavirus are established oncogenic viruses linked with human cancers.

• A. Verruca vulgaris
• B. Lymphoepithelioma
• C. Junctional nevus
• D. Basal cell carcinoma

Explanation: Ultraviolet radiation from sunlight is a major risk factor for basal cell carcinoma, especially on sun-exposed skin.

• A. Intro epithelial carcinoma
• B. Benign neoplasm of the G.I.T
• C. Vesiculobullous lesion of skins
• D. Ulcerative lesion of G.I.T

Explanation: Bowen disease is squamous cell carcinoma in situ, meaning atypical epithelial cells involve the full epithelial thickness without invasion…

• A. Buccal mucosa
• B. Skin of the lower lip
• C. Hard Palate
• D. Dorsum of the tongue

Explanation: Among the listed choices, basal cell carcinoma most commonly occurs on sun-exposed facial skin, including the skin of the lower lip.

• A. Central nervous system lesion
• B. Meta static carcinoma
• C. Osteomyelitis
• D. Infection

Explanation: Unexplained numbness of the lower lip, or numb-chin syndrome, is an important warning sign of metastatic carcinoma involving the…

• A. Leukemia
• B. Amyloidosis
• C. AIDS
• D. HSV infection

Explanation: Kaposi sarcoma is strongly associated with advanced HIV infection and AIDS because of impaired immunity and HHV-8 infection.

• A. Leukoplakia should be proved by biopsy
• B. Leukoplakia does not disappear even after cessation of smoking
• C. Oral submucous fibrosis is seen in all parts of the world
• D. Erythroplakia has a higher risk for malignancy than leukoplakia

Explanation: Erythroplakia carries a substantially greater risk of epithelial dysplasia or carcinoma than leukoplakia, making it the high-risk lesion…

• A. >2 cm
• B. >4 cm
• C. 4 cm with invasion of adjacent structure

Explanation: In the conventional TNM classification, T3 indicates a primary oral tumour larger than 4 cm.

• A. Hemangioma
• B. Focal epithelial hyperplasia
• C. Kaposi's sarcoma
• D. Acute pseudo-membranous candidiasis

Explanation: Multiple reddish or violaceous exophytic oral nodules in a patient with AIDS are highly suggestive of Kaposi sarcoma, which is associated…

• A. Tongue
• B. Posterior maxilla
• C. Floor of the mouth
• D. Posterior mandible

Explanation: The posterior mandible is the commonest oral site for metastatic deposits, particularly because of its persistent red marrow and rich…

• A. Breast
• B. Prostatic
• C. Lung
• D. Kidney

Explanation: Breast carcinoma is classically the most frequent primary cancer to metastasize to the jaws, followed by sources such as lung, prostate…

• A. Occurs mostly in the maxilla
• B. Highly malignant tumour which shows early metastasis
• C. Seen in old age
• D. Shows a soap bubble type of radiolucency in radiographs

Explanation: Osteosarcoma is a malignant bone-forming tumour with potential for hematogenous, especially pulmonary, metastasis.

• A. Malignant
• B. Sarcoma
• C. squamous cell carcinoma
• D. Fibro-sarcoma

Explanation: Squamous cell carcinoma is the commonest malignant tumour of the gingiva and may resemble periodontal disease clinically.

• A. Heart
• B. Liver
• C. Spleen
• D. Lung

Explanation: Sarcomas spread mainly through the bloodstream, and the lungs are the first major capillary bed where circulating tumour emboli commonly…

• A. Basal cell carcinoma
• B. Malignant melanoma
• C. Fibrosarcoma
• D. Leukoplakia

Explanation: Basal cell carcinoma is locally destructive and very rarely metastasises, so it is often described as a tumour with local invasion but…