Pathology · single question

What is the most common benign odontogenic tumor?

  1. Pindborg tumor (Calcifying Epithelial Odontogenic Tumor)
  2. Ameloblastoma
  3. Adenomatoid odontogenic tumor (AOT)
  4. Odontoma
Show answer and explanation

Correct answer: D. Odontoma

D) Odontoma — CORRECT (most common overall).
The odontoma is the most common odontogenic tumor overall. However, among NEOPLASMS (true tumors, not hamartomas), the ameloblastoma is the most common. The INBDE often asks about the most common odontogenic NEOPLASM (= ameloblastoma) vs. most common odontogenic "tumor" broadly (= odontoma). Know both.
A) Pindborg tumor (CEOT): Rare — characterized by calcified amyloid-like material and "driven snow" calcifications.
B) Ameloblastoma: Most common odontogenic NEOPLASM — local invasiveness, posterior mandible. Not the most common "tumor" if odontoma is an option.
C) AOT: "AOT" — Anterior, young females, associated with unerupted canine; NOT the most common.

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