Free Oral Cancer MCQs with Answers

• 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…

• A. Homogenous leukoplakia
• B. Nodular leukoplakia
• C. Verrucous leukoplakia
• D. Ameloblastic fibroma

Explanation: Nodular or speckled leukoplakia contains a greater proportion of epithelial dysplasia and has a higher malignant-transformation risk than…

• A. metastatic breast carcinoma
• B. paget's disease
• C. osteosarcoma
• D. Fibrous dysplasia

Explanation: Asymmetric widening of the periodontal ligament involving multiple adjacent teeth is a classic radiographic warning sign of osteosarcoma.

• A. Ground-glass appearance
• B. Cotton-wool appearance
• C. Soap-bubble appearance
• D. Sun-brust appearance

Explanation: Jaw osteosarcoma may produce a sunburst or sun-ray pattern when malignant osteoid and tumour growth extend through the cortex and…

• A. Irradiation of tissues by implants within the tissues
• B. Irradiation of tissues from a distance of 3 cm
• C. Irradiation of tissues from a distance
• D. Irradiation of tissues by radiopharmaceuticals

Explanation: Brachytherapy is internal radiotherapy, in which radioactive sources are placed within or immediately beside the tumour tissue.

• A. Tongue
• B. Lip
• C. Palate
• D. Floor of the mouth

Explanation: Lip squamous cell carcinoma generally has the best prognosis among the listed oral sites because it is often detected earlier and has more…

• A. Sudden swelling
• B. Paraesthesia
• C. Root resorption
• D. Diffuse radiolucency

Explanation: Paresthesia, especially unexplained numbness in the distribution of the mental or inferior alveolar nerve, is a classic warning sign of…

• A. Ventral surface
• B. Tip of tongue
• C. Posterio 1/3
• D. Lateral margin

Explanation: The lateral border of the tongue is the commonest site for oral tongue carcinoma, particularly the posterolateral region.

• A. Invasion
• B. Degeneration
• C. Pleomorphism
• D. Encpsulation

Explanation: Invasion of malignant epithelial cells through the basement membrane into connective tissue is the decisive histologic evidence of…

• A. Brain
• B. Regional lymph nodes
• C. Lung
• D. Liver

Explanation: Carcinoma of the cheek generally spreads first through lymphatic drainage to the regional cervical and submandibular lymph nodes.