- Disk bulge
- Disk protrusion
- Disk sequestration
- Disk extrusion
Answer: 3
Disk sequestration is the separation of the disk fragment from the nucleus pulposus. In a disk bulge, the annular fibbers are intact. Protrusion of the disk involves localized bulging of the disk with damaged annular fibbers. Disk extrusion involves an extended bulge with destroyed annular fibbers; the disk is intact.