Primary intraosseous mucoepidermoid carcinoma of the maxilla: a case report and review of literature.

Primary intraosseous mucoepidermoid carcinoma (PIOC) of the jaw bones is an extremely rare malignant salivary gland tumour. It is commonly seen in the posterior part of the mandible; its occurrence in the maxilla is rare. The aetiopathogenesis of the PIOC is not completely understood.