45 - oral cavity surgery mcqs - part 2

11q: a 60 year old man presents with an ulcer on lateral margin of tongue also complaints of ear pain , most probable diagnosis ?

 

1. dental ulcer
2. carcinomatous ulcer
3. tuberculous ulcer
4. syphilitic ulcer

 

answer: b . carcinomatous ulcer. The clue in the question is the site of the ulcer and the age of the patient with pain reference . the most common site of carcinoma of tongue is the anterior 2/3 rd or middle 1/3 rd of the tongue .

 

12q: anatomical structure injured in excision of ranula ?

 

1. lingual vein
2. lingual artery
3. submandibular duct
4. parotid duct

 

answer: c . submandibular duct .

 

13q: areas of carcinoma of oral mucosa can be identified by staining with ?

 

1. 1% zinc chloride
2. 2% silver nitrate
3. Gentian violet
4. 2 % toluidene blue

 

Answer: d . 2 % toluidene blue .

 

14q: radiographic finding of floating teeth can be seen in ?

 

1. ectodermal dysplasias
2. cleidocranial dysplasias
3. osteoporosis
4. histiocytosis – X

 

answer: d . histiocytosis – X .

 

15q: dentigerous cyst arises from ?

 

1. an unerupted tooth
2. apex of an infected tooth
3. nasopalatine cysts
4. solitary bone cysts
5. multi locular keratocytes

 

answer: a . an unerupted tooth .

 

16q: the commonest pre-malignant condition of oral cancer is ?

 

1. leukoplakia
2. apthous ulcer
3. lichen planus
4. erythro-leukoplakia

 

answer: a . leukoplakia .

 

17q: multiple painful ulcers on tongue are seen in all except ?

 

1. apthous ulcers
2. tuberculous ulcers
3. herpes ulcers
4. carcinomatous ulcers

 

answer: d . carcinomatous ulcers are normally painless in the early stages , but in advanced cases due to involvement of surrounding structures they become painful .

 

18q: predisposing factors for development of oral carcinoma is ?

 

1. smoking
2. alcohol
3. syphilis
4. all the above

 

answer: d . all the above .

 

19q: a full thickness loss of middle one third of the upper lip is best reconstructed by?

 

1. nasolabial flap
2. cheek flap
3. abbey flap
4. estlander flap

 

answer: c,d . abbey-estlander flap is most commonly used in the reconstruction of the upper lip .

 

20q: which of the following best represents ranula ?

 

1. a type of epulis
2. a thyroglossal cyst
3. cystic swelling in the floor of mouth
4. forked uvula

 

answer: c . cystic swelling in the floor of mouth .