Pathology · single question
A radiolucent lesion is found between teeth #13 and #14 (between upper left canine and first premolar). Which diagnosis would be LEAST likely (EXCEPT)?
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Correct answer: D. Traumatic bone cyst
✓ D) Traumatic bone cyst is the EXCEPTION (least likely / excluded).
Traumatic (simple) bone cysts occur almost exclusively in the mandible (posterior body/symphysis), not in the maxilla. A lateral radiolucent lesion between premolars in the maxilla makes traumatic bone cyst essentially impossible. OKC, lateral periodontal cyst, and ameloblastoma (though rare in this location) can all appear as lateral radiolucencies and should be included in the differential.
Traumatic (simple) bone cysts occur almost exclusively in the mandible (posterior body/symphysis), not in the maxilla. A lateral radiolucent lesion between premolars in the maxilla makes traumatic bone cyst essentially impossible. OKC, lateral periodontal cyst, and ameloblastoma (though rare in this location) can all appear as lateral radiolucencies and should be included in the differential.