Fig. 4From: Discography aids definitive diagnosis of posterior epidural migration of lumbar disc fragments: case report and literature reviewGross appearance of the dorsal lumbar-disk herniation. a Intraoperative view of the dural sac after L2/3/4 laminectomy, showing the extracted disc fragment (arrowhead) and its attachment to the posterior dural sac. b The collected samples had a soft and yellowish appearance. Scale bar: 10Â mmBack to article page