2020 Volume 33 Issue 3 Pages 242-247
An osteoma is a benign tumor with proliferation of mature bone tissue, often found in the facial-cranial bones. Patients with osteoma often complain of cosmetic disturbance. We report a case of a comparatively large osteoma found in the mandibular angle in a 45-year-old man. He was referred to our hospital by his dental clinic for examination of a swelling of the right cheek. His complexion was asymmetric because of the immobile, bone-like hard mass in his right mandibular angle. Facial CT showed a pedunculated mass about 35×21mm in size in the outer surface of the right mandibular angle. Diagnosed as an osteoma, the mass was resected by an extraoral approach under general anesthetic. The pathological diagnosis was peripheral osteoma with proliferation of mature lamellar bone. Postoperative esthetic appearance was satisfactory. Two years after the operation, there is no evidence of recurrence in this patient.
