Spinal intradural ependymal cyst: a case report and review of the literature.

Spinal intradural ependymal cysts are extremely rare. The case presented is the sixth reported in the literature. The symptoms are consistent clinically and radiologically with a spinal intradural space-occupying lesion. The cyst wall is lined with both ciliated and nonciliated cells, resting directly on connective tissue. The exact embryonal origin of these cysts is obscure.