Solitary extradural cavernous hemangiomas in the spinal canal. Report of five cases.

Five cases of solitary extrathecal cavernous hemangioma in the spinal canal are reported. In one case, two coexistent massive cerebral venous medullary malformations were found. The symptomatology and prognosis of extrathecal spinal cavernous hemangiomas are discussed, as is the significance of various diagnostic measures. The patient material further permitted a rough calculation of the incidence of symptomatic extrathecal cavernous hemangiomas in the spinal canal.