Multiple spinal canal meningiomas.

Three cases of multiple spinal canal meningiomas are presented, bringing the total number of documented cases in the American literature to nine. While the exact incidence of multiple spinal meningiomas is difficult to determine, their possible occurrence warrants careful myelographic examination of the whole spinal canal, particularly if multiple clinical levels are present. When a complete block to the contrast agent is encountered, myelography should also be carried out via an upper cervical puncture. The radiograhic appearances of multiple meningiomas are nonspecific.