ODONTOGENIC KERATOCYST OF THE BUCCAL MUCOSA

A 64-year-old male patient presented an asymptomatic, long-lasting, submucosal enlargement at the right buccal mucosa. The lesion had a nodular appearance, was well circumscribed, was mobile, had a firm consistency, and was covered by clinically healthy mucosa. Ultrasonography revealed a hypoechoic, hypovascular, lobulated, and partially circumscribed lesion measuring 4.5 × 2.1 cm. The diagnostic hypotheses were epidermoid cyst or lipoma. The lesion was surgically excised under local anesthesia. During the excision, a dark-brown liquid drained out of the lesion. Histopathologic examination revealed a cystic lesion lined by a uniform, thin, parakeratinized epithelium with corrugated surface. The basal cell layer was hyperchromatic with nuclei palisade. The diagnosis was of odontogenic keratocyst. Panoramic radiograph revealed no bone involvement, and the patient showed no signs of Gorlin-Goltz syndrome. The patient is disease-free after 12 months of follow-up. Support: FAPEMIG.