Definition: An odontogenic epithelium neoplasm with a thin keratinized lining.  This entity was previously named odontogenic keratocyst (OKC).

Radiographic Features:

Location: Posterior mandible and ramus (most common) but can occur anywhere in the maxilla or mandible.

Edge: Well-defined to well-localized.

Shape: Round to no identifiable shape.

Internal: Radiolucent (unilocular or multilocular).

Other: Tendency to grow along the jaw with minimal expansion.

Number: Single.  If multiple, an underlying syndrome should be considered (basal cell nevus syndrome/Gorlin-Goltz syndrome).

(Click image to enlarge)

Keratocystic odontogenic tumor – right posterior mandible

Keratocystic odontogenic tumor – anterior mandible