Schwannoma of the Mandible

A case of intraosseous schwannoma of the mandible is presented. This tumor was so large that expansion of the lingual cortex of the alveolar bone led to perforation. It was linked with the inferior alveolar nerve in the distal side and the mental nerve in the mesial side, and therefore the nerve was severed and electrocoagulated. Histopathologically, the tumor showed characteristics of a schwannoma, with a mixture of Antoni- A and -B areas. Atypical cells and degeneration were also seen. The defect of the mandibular bone after enucleation of the tumor was filled with a mixture of iliac cancellous bone marrow and hydroxyapatite granules. There has been no sign of recurrence of this tumor for nine years since the operation.