Lumbar disc sequestration mimicking a tumor: Report of four cases and a literature review

Figure 2 Imaging examination of case 2. A: T1-weighted preoperative MRI image showing low signal intensity; B and C: Preoperative T2-weighted image showing low signal intensity, and an axial T2-weighted image demonstrating disc fragments in the right posterior epidural space; D and E: Preoperative contrast-enhanced MRI suggested heterogeneous peripheral ring enhancement; F: Postoperative pathology suggested intervertebral disc tissue; G and H: X-ray on postoperative day 2 indicated intact internal fixation.