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[Lumbar intervertebral herniation. The composition of free sequesters--a morphologic study]
Wojciech J Łebkowski1, Janusz Dziecioł
1Klinika Neurochirurgii, Akademia Medyczna w Białymstoku.
Chirurgia Narzadow Ruchu I Ortopedia Polska
|November 7, 2002
Summary
Free sequestration of disc fragments occurs in 15.5% of lumbar disc herniation surgeries. These fragments are typically nucleus pulposus material, with some cases involving end-plate or anulus fibrosus elements.
Area of Science:
- Spinal Surgery
- Orthopedics
- Neurosurgery
Context:
- Lumbar disc herniation surgery has evolved since 1934.
- Disc herniations are classified into protrusion, prolapse, and free sequestration.
- Previous studies focused on protruded and prolapsed discs, neglecting free sequestered elements.
Purpose:
- To determine the frequency of free sequestered intervertebral disc fragments.
- To investigate the morphological characteristics of these sequestered discs.
Summary:
- Free sequestered disc fragments were identified in 15.5% of 187 operated cases.
- Nucleus pulposus material comprised 55.2% of the sequesters.
- End-plate elements were found in 41.4% and anulus fibrosus in 3.4% of cases.
Impact:
- Highlights the prevalence of free sequestration in lumbar disc herniation.
- Provides morphological insights into sequestered disc fragments.
- May inform surgical strategies and understanding of disc pathology.