2009 Volume 55 Issue 11 Pages 571-574
Schwannoma is a benign neoplasm arising from the Schwann cells of the neural sheath. It is a relatively rare tumor in the oral region. Schwannoma of the upper lip is extremely rare.
We report a case of schwannoma of the upper lip. A 77-year-old woman visited our hospital because of a painless swelling of the left side of the upper lip. Magnetic resonance images showed a well-defined, liquiform lesion that was hypointense on T1-weighted images and hyperintense on T2-weighted images. The lesion was surgically resected. Histopathological examination of the resected tumor revealed a schwannoma, which was mixture of Antoni type A and B. As of 18 months after the operation, there is no evidence of recurrence.
