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Pathology · single question

A radiolucency is found between teeth #13 and #14. Which of the following is NOT a likely differential diagnosis?

  1. Traumatic bone cyst
  2. Ameloblastoma
  3. Odontogenic keratocyst (OKC)
  4. Lateral periodontal cyst
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Correct answer: B. Ameloblastoma

  • A. Incorrect — traumatic bone cyst IS a valid differential; it can appear in the premolar-molar region.
  • B. Correct. Ameloblastoma is the EXCEPTION. It typically occurs in the POSTERIOR MANDIBLE (third molar region) and has a multilocular 'soap-bubble' appearance. It is NOT a classic diagnosis for an interradicular radiolucency between maxillary premolars.
  • C. Incorrect — OKC IS a valid differential; it can appear anywhere in the jaws.
  • D. Incorrect — lateral periodontal cyst IS a valid differential for an interradicular radiolucency between adjacent teeth.

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