Odontogenic keratocyst of the maxilla: a case report.

Remnants of odontogenic epithelium persist in oral tissues after odontogenesis is complete, and from these remnants a variety of tumours and cysts can arise. Squamous metaplasia can occur in this epithelium which in turn may produce keratin. Although keratin production is a feature of many odontogenic cysts, a specific entity, the odontogenic keratocyst has been defined. The term was first introduced by Philipsen in 1956 and has been used synonymously with that of the primordial cyst. Its capacity for aggressive growth and recurrence even after many years makes it of special interest. In this case report these behavioural characteristics are well demonstrated. The long natural history of the condition in this case and its site and size involved oral, ophthalmic and ultimately otolaryngologic surgeons.