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 disks that still have continuity or those without, i.e. sequestrated (e.g. disc extrusion migrated caudally, sequestrated disc migrated cranially). 

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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

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Cases and figures

  • Case 1: on sagittal T2
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  • Case 2: sequestered disc extrusion
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