Abstract
Squamous odontogenic tumor (SOT) is a rare odontogenic tumor. This report describes a case of maxillary SOT. A 20-year-old woman was referred for diagnosis of a maxillary swelling of 9 months duration. Cone beam computed tomography analysis revealed a well-circumscribed, unilocular, and hypodense image located in the left maxilla. An enlargement of the buccal and palatine cortical plates was observed, besides divergence of roots of the left canine and first premolar. An odontogenic cyst or tumor was the main hypothesis of diagnosis. The lesion was excised under general anesthesia. Microscopically, islands of well-differentiated squamous epithelial cells in a mature connective tissue were observed. The tumor islands showed flat to cuboidal cells and exhibited vacuolization and microcystic formation. A diagnosis of SOT was established. After 2 years of treatment, no signs of recurrence were noted. Although uncommon, SOT should be considered in the differential diagnosis of radiolucent and hypodense periradicular lesions.
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