OKC vs Dentigerous Cyst — NDEB AFK MCQ
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Correct answer: B — Scalloped borders and tendency to grow along the medullary cavity without significant expansion
The OKC classically grows anteroposteriorly along the medullary cavity of the mandible without significant buccolingual expansion (unlike ameloblastoma or dentigerous cyst which expand the cortex). Its scalloped borders distinguish it from the smooth borders of a dentigerous cyst. A dentigerous cyst attaches at the CEJ. While OKCs can be associated with unerupted teeth, the growth pattern and scalloped margins are more discriminating features.
Reference: Neville – Oral and Maxillofacial Pathology, 4th ed., 2016; White & Pharoah – Oral Radiology, 8th ed., 2019