Oral & Maxillofacial Surgery Question Bank

Read the Oral & Maxillofacial Surgery Question Bank sample questions

1. 1.Most common malformation of head and neck region is:

   • A.cleft lip and palateCorrect
   • B.hemangioma
   • C.preauricular cyst
   • D.malformation of ear

   Why: Cleft lip and palate is the most common congenital malformation of the head and neck region, arising from failure of fusion of the embryonic facial and palatal processes. Hemangiomas and ear/preauricular anomalies are far less frequent overall.

2. 2.Most common type of cleft in males is:

   • A.unilateral cleft lip alone
   • B.unilateral cleft palate alone
   • C.unilateral lip and palateCorrect
   • D.Bilateral cleft lip

   Why: In males the most common cleft pattern is the complete unilateral cleft of lip and palate together, typically on the left side. Cleft lip (with or without palate) predominates in males, whereas isolated cleft palate is more common in females.

3. 3.A patient presents with small yellow spots, present bilaterally on buccal mucosa opposite to posterior teeth without any other associated complaint. Most probable diagnosis of the condition is:

   • A.Koplik's spot
   • B.Fordyce's granulesCorrect
   • C.Melanotic macule
   • D.White sponge nevus

   Why: Small, painless, yellowish papules bilaterally on the buccal mucosa opposite the posterior teeth are classic Fordyce's granules, which are ectopic sebaceous glands. They are a normal variant requiring no treatment, unlike Koplik's spots (measles) which are on a red base and symptomatic.

4. 4.A patient presented with asymptomatic, smooth, circumscribed red area in midline anterior to circumvallate papillae on the dorsum of tongue with microscopic evidence of epithelial hyperplasia. The most probable diagnosis of the condition is:

   • A.geographic tongue
   • B.hairy tongue
   • C.median rhomboid glossitisCorrect
   • D.lingual thyroid

   Why: A smooth, well-circumscribed red area in the midline of the dorsum of the tongue just anterior to the circumvallate papillae is characteristic of median rhomboid glossitis, often associated with Candida and showing epithelial hyperplasia microscopically. Its midline location distinguishes it from geographic tongue and lingual thyroid.

5. 5.In hairy tongue, there is hypertrophy of:

   • A.fungiform papillae
   • B.filiform papillaeCorrect
   • C.foliate papillae
   • D.circumvallate papillae

   Why: Hairy tongue results from marked hypertrophy and retained keratin of the filiform papillae, producing elongated hair-like projections that trap debris and pigment. The other papillae (fungiform, foliate, circumvallate) are not the source of this elongation.

6. 6.A patient present with an asymptomatic soft, fluctuant swelling of the angle of mandible anterior to sternocleido-mastoid muscle which he stated to be present since his childhood days. Regional lymph nodes are nonpalpable with normal radiographic pictures of the area and normal blood and urine examination. Aspiration of swelling shows yellow-brown fluid. Most

   • A.thyroglossal duct cyst
   • B.salivary gland tumor
   • C.branchial cleft cystCorrect
   • D.follicular ameloblastoma

   Why: A long-standing, soft, fluctuant swelling at the angle of the mandible anterior to the sternocleidomastoid that yields yellow-brown (often cholesterol-rich) fluid on aspiration is typical of a branchial cleft cyst. Its lateral neck position and chronicity since childhood favor this over a midline thyroglossal cyst.

7. 7.Which of the following condition is characterized by generalized intestinal polyposis with pigmentation of face and oral mucosa:

   • A.Which of the following condition is characterized by generalized intestinal polyposis with pigmentation of face and oral mucosa:Correct
   • B.Albright syndrome
   • C.Gardner syndrome
   • D.Neurofibromatosis

   Why: Peutz-Jeghers syndrome is characterized by generalized intestinal (hamartomatous) polyposis combined with mucocutaneous melanotic pigmentation of the lips, face and oral mucosa. Gardner syndrome involves colonic adenomas with osteomas, and neurofibromatosis features cafe-au-lait macules and neurofibromas.

8. 8.A 25-year al patient presents with an asymptomatic doughy soft, fluctuant swelling on lateral neck which was present for month but recently enlarged following an upper respiratory tract infection. Most likely diagnosis of the swelling is:

   • A.scrofula
   • B.lymphoma
   • C.cervicofacial actinomycosis
   • D.cervical lymphoepithelial cystCorrect

   Why: A doughy, fluctuant lateral neck swelling that enlarges following an upper respiratory infection is typical of a cervical lymphoepithelial (branchial) cyst, which contains lymphoid tissue that reacts to infection. Scrofula and lymphoma usually present as firmer, progressive masses.

9. 9.Most characteristic histopathologic feature of keratoacanthoma is:

   • A.elevation of normal epithelium towards the central portion of the lesion with an abrupt change in normal epithelium as hyperplastic acanthotic epithelium is reachedCorrect
   • B.hyperplastic squamous epithelium growing into underlying connective tissue
   • C.occasional dysplastic features
   • D.epithelium appears to be invading into connective tissue at deep leading margin of the tumor

   Why: Keratoacanthoma classically shows a central keratin-filled crater with the surrounding hyperplastic, acanthotic epithelium rising up toward the center in a buttressing pattern, with an abrupt transition from normal to lesional epithelium. This architectural feature, rather than frank invasion, is its hallmark.

10. 10.A patient reported with an asympthomatic white patch on buccal mucosa which cannot be rubbed off. The patch was present for the last 3 months. Patient is a heavy cigarette smoker. Most probable diagnosis of the lesion is:

    • A.LeukoplasiaCorrect
    • B.Candidiasis
    • C.Erythroplakia
    • D.White sponge nevus

    Why: A persistent white patch that cannot be wiped off, in a heavy smoker, is leukoplakia, which is a clinical diagnosis of exclusion and a potentially premalignant lesion. Candidiasis would rub off, and erythroplakia is red rather than white.