Disc sequestration

Sequestrated disc, also referred to as a free disc fragment, corresponds to extruded disc material that has no continuity with the parent disc and is displaced away from the site of extrusion. By definition, it corresponds to a subtype of disc extrusion.

The term "migrated" disc refers only to position and not to continuity of disc substance. So, this term can be used when referring either to extruded discs that still have continuity or those without, i.e. sequestrated (e.g. disc extrusion migrated caudally, sequestrated disc migrated cranially). 

Share article

Article information

rID: 43528
Tag: refs
Synonyms or Alternate Spellings:
  • Fragment of disk
  • Free disk fragments
  • Free disc fragments
  • Sequestered disk
  • Sequestered disc
  • Sequestrated disk
  • Disk sequestration
  • Intervertebral disc sequestration
  • Sequestrated disc
  • Free disc fragment
  • Fragment of disc
  • Sequestration of disc
  • Sequestration of inververtebral disc

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Sagittal T2-Weigh...
    Case 1: on sagittal T2
    Drag here to reorder.
  • Drag
    Case 2: sequestered disc extrusion
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.