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Disk fragment migration.

D Schellinger1, H J Manz, B Vidic

  • 1Department of Radiology, Georgetown University Medical Center, Washington, DC 20007.

Radiology
|June 1, 1990
PubMed
Summary
This summary is machine-generated.

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Disk fragments most often migrate up or down within the anterior epidural space (AES), rarely crossing the midline. This migration pattern is dictated by the AES

Area of Science:

  • Neurosurgery
  • Radiology
  • Anatomy

Background:

  • Extruded and sequestered intervertebral discs are common causes of spinal pain.
  • Understanding disc fragment migration is crucial for surgical planning and patient outcomes.

Purpose of the Study:

  • To analyze the migration patterns of extruded or sequestered lumbar disc fragments.
  • To elucidate the anatomical factors influencing disc fragment migration within the anterior epidural space (AES).

Main Methods:

  • Retrospective analysis of magnetic resonance (MR) images from 47 patients with extruded or sequestered discs.
  • Cadaveric dissection of four spinal specimens to examine AES anatomy.
  • Review of 300 spinal MR images to correlate findings with anatomical structures.

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Main Results:

  • Disc fragments predominantly migrated in superior (42%) or inferior (40%) directions.
  • 94% of migrating fragments lodged in one lateral compartment of the AES, rarely crossing the midline.
  • The AES anatomy, including its compartmentalization by a sagittal septum, was identified as the primary determinant of migration paths.

Conclusions:

  • The anatomical structure of the anterior epidural space significantly dictates the migration pathways of sequestered disc fragments.
  • Disc fragments tend to remain within their respective AES compartments during migration.
  • This understanding aids in predicting fragment behavior and optimizing treatment strategies for spinal disc herniation.