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Dentistry · Oral pathology: cysts and odontogenic tumours: botryoid odontogenic cyst
Sample itemA biopsy of a multilocular lateral radiolucency beside the roots of a mandibular canine shows a cluster of small cysts like a bunch of grapes, with the histology of a lateral periodontal cyst. It has a higher recurrence rate than the usual unilocular lesion. What is it?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Botryoid odontogenic cyst
The botryoid odontogenic cyst is a polycystic variant of the lateral periodontal cyst. Its multilocular pattern means that small loculi may be left behind, so recurrence is more frequent and thorough removal is needed.
Option by option
A. Central giant cell granuloma
A giant cell granuloma is a solid lesion with multinucleated giant cells.
B. Unicystic ameloblastoma
Unicystic ameloblastoma shows ameloblastic epithelium in the lining and is unilocular.
C. Odontogenic myxoma
Odontogenic myxoma is a solid myxoid tumour and not a cluster of cysts.
D. Botryoid odontogenic cyst (correct)
Correct. A multilocular, grape-like variant of the lateral periodontal cyst is the botryoid cyst.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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