A case of schwannoma in the parotid-masseteric region

Schwannoma is a benign tumor derived from abnormal growth of Schwann cells. We report a case of a schwannoma in the parotid-masseteric region. A 24-year-old woman was referred to our department because of the swelling in the right preauricular area. Clinical examination showed a movable, elastic-hard mass, 22 mm × 31 mm in diameter, in the parotid-masseteric region. Magnetic resonance images showed a well-defined lesion that was hypointense on T1-weighted images and hyperintense on T2-weighted images in the right parotid-masseteric region. Under tentative diagnosis of benign tumor, the lesion was enucleated under general anesthesia. The excised specimen had a pale yellowish surface, measured 28 mm × 19 mm × 15 mm in size. The histopathological diagnosis was a schwannoma (Antoni A). The postoperative course of the patient is uneventful for 5 years.