A case report of meningioma with the ossification continuing with the vertebral body.

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A case of meningioma with the ossification which is continuing with the thoracic vertebral body is reported here. A seventy-nine-year old woman consulted our hospital, complaining of the gait disturbance and paresthesia in the lower extremities. MRI showed evidence of extramedullary mass at T2-3. A myelogram showed a "cap" shaped block at the same block, suggesting an intradural extramedullary tumor. Then a laminectomy and excision of tumor was performed. Pathological diagnosis of the specimen was psammomatous meningioma. The tumor, about 0.8cm×1.0cm in size, had the ossification continuing with the thoracic vertebral body. The meningioma is famous for the characteristic which produces bone or calcification. Reports of the meningioma with the ossification are sometimes seen. However, as seen in our case, a bone-infiltrating meningioma is very rare.