Malignant Squamous Changes in Unicystic Ameloblastoma:A Case Report and Review of Literature

Unicystic ameloblastoma, a variant of solid or multicystic ameloblastoma is commonly reported to occur in third decade and encountered in the posterior mandible with a biologically low-grade course and with limited recurrence potential. Clinically, it frequently manifests as a painless swelling, which can be accompanied by facialde formity, malocclusion and paresthesia of the affected area. Histologically, the minimum criterion for diagnosing a lesion as unicystic ameloblastoma is the demonstration of a single cystic sac lined by odontogenic (ameloblastomatous) epithelium often seen only in focal areas whereas radiographically they represent a unilocular radiolucency. This report however, is first to show malignant squamous conversion of unicystic ameloblastoma lining in a 35 year old female patient.