A case of schwannoma arising in the masseter muscle

Schwannoma is a benign tumor developing from the Schwann’s sheath of peripheral nerves, constituted Schwann cells and collagen fibrous matrix. The frequency occurrence in oral region high tongue, while rare masseter muscle. Here, we report case schwannoma left patient was 64-year-old man with indolent swelling cheek, measuring 50×45 mm. Magnetic resonance imaging showed 44 mm clear margin. T1-weighted homogeneous signal similar to muscle, T2-weighted an internal non-homogeneous, low at center. removed outside mouth under general anesthesia. Motor nerve paralysis lower lip appeared after surgery but disappeared two months. covered capsule, there no adhesion surrounding tissue. Neural tissue not found near tumor. histopathological diagnosis schwannoma. Recurrence has been observed 5 years 11 months surgery.