Intraosseous carcinoma arising from an odontogenic cyst: a case report.

Carcinomas from an odontogenic cyst are not common, yet when they occur, squamous cell carcinomas are the most often seen. Among these cysts, the malignancy of keratocysts or dentigerous cysts are most likely. In contrast, a malignant transformation of a radicular cyst to an intraosseous carcinoma is extremely rare. In this case report, an intraosseous carcinoma arising from an odontogenic cyst in a 26-year-old male patient is presented. This case report clearly demonstrates the importance of the clinician's awareness of the malignant potential of apparently innocuous cystic lesions.