Abstract
Peripheral odontogenic fibroma is a rare ectomesenchymal benign tumor arising in the gingiva. The histologic characteristics include scattered cords and nests of the inactive odontogenic epithelium, and varying amounts of calcification forming dentinoid, osteoid, cementum-like material in fibrous connective stroma.
A 54-year-old woman was referred to our clinic because of a gingival mass in the left posterior mandibular region. The clinical examination revealed a firm, smooth-surfaced painless mass, measuring 20 × 25 mm in diameter, at the attached gingiva. A panoramic X-ray film showed a well-defined radiolucent lesion with scattered radio-opacities. Under general anesthesia, the lesion was resected surgically with a 3-mm safety margin, including the periosteum abutting on the mass. Moreover, curettage and shaving of the cortical bone of the mandible adjacent to the mass were performed. The lesion was diagnosed as a peripheral odontogenic fibroma histopathologically. There has been no sign of recurrence for 22 months after surgical resection.
