Intradural Disc Migration as a Complication of Chronic Disc Prolapse

Abstract

Intradural migration of extruded disc is a rare phenomenon. The multiple anatomical barriers including annulus fibrosus, posterior longitudinal ligament, and dural sheath which limit migration of the intervertebral disc material are breached when this happens. It usually happens in case of disc prolapse of prolonged duration. We here report a rare case of dorsal intradural migration of an extruded disc fragment. The report is to emphasize the importance of proper preoperative evaluation and high clinical suspicion needed for preoperative diagnosis of this entity and to plan the treatment accordingly.

Keywords

• chronic disc prolapse; intradural disc migration; sequestrated disc herniation