Fig. 3From: Unplanned revision spinal surgery within a week: a retrospective analysis of surgical causesMagnetic resonance images of persistent herniated disc with dural sac compression. This patient had right buttock and leg pain for 3 months, and the symptoms persisted after right L4–5 discectomy. Postoperative a sagittal and b cross-sectional magnetic resonance imaging revealed persistent herniated disc with dural sac compression (arrows)Back to article page