Abstract

Mastoid osteomas are rare, slow-growing and usually asymptomatic benign neoplasms. Treatment is surgical excision for the aesthetic reasons and the related symptoms. Osteosarcoma, fibrous dysplasia, metastatic tumors, giant cell tumors, and multiple myeloma should be considered for the differential diagnosis. A 26-year-old woman was admitted to our clinic with gradually increasing painless mass on the left postauricular region for five years. She had a trauma history and hematoma formation on the same region. The patient was asymptomatic, however complaining about the aesthetic appearance. Physical examination revealed a painless mass with bony consistency, approximately 3.5x3.0 cm in size on the left postauricular region. It was non-tender, fixed to the mastoid, hard and had smooth surface. Overlying skin was normal. Computed tomography demonstrated a bony mass arising from the mastoid cortex of the well-pneumatized left temporal bone. The mass was surgically excised by retroauricular approach for aesthetic reasons. Histopathologic diagnosis was reported as an osteoma. Postoperative period was uneventful and there was no recurrence on six-month follow-up examination.