Intrasacral perineurial cyst.

A rare case of intrasacral perineurial cyst is presented. Findings on metrizamide myelography and computed tomography scan are described, and their usefulness in the diagnosis of this rare condition is emphasized. The literature is reviewed, and the clinical and pathological features of the 17 reported cases including our own are summarized. Indication for operation and surgical approach are briefly discussed.