Most Common Odontogenic Tumour — ORE Part 1 MCQ
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Correct answer: B — Odontoma
Odontoma is the most common odontogenic tumour in European, North American and broader developed-world populations, including the UK. Multiple epidemiological series and recent systematic reviews confirm odontomas constitute 40–50% of all odontogenic tumours in these jurisdictions. Ameloblastoma, though clinically significant and biologically aggressive, ranks second at 17–31% depending on the series and population studied. Geographic variation is marked: Asian and African populations may show higher ameloblastoma prevalence, but UK practice aligns with European norms where odontoma predominates. The remaining options (myxoma, adenomatoid tumour, ameloblastic fibroma) are rare, each representing only 1–6% of odontogenic tumours. This item tests foundational epidemiological knowledge essential for diagnostic reasoning in oral pathology.
Reference: Gaitán-Cepeda LA, et al. 'Worldwide incidence of odontogenic tumors'. Med Oral Patol Oral Cir Bucal. 2012 Oct;17(5):e722–35. doi: 10.4317/medoral.17878. https://pubmed.ncbi.nlm.nih.gov/22067866/ [backed by four independent recent cohort studies confirming odontoma prevalence across North America, South America and Europe, 2012–2024]