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Transitional lumbosacral discs. probability of herniation

R E Wigh, H F Anthony

    Spine
    |March 1, 1981
    PubMed
    Summary
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    Transitional vertebrae in the lumbar spine may present with varied disc appearances. Surgery for suspected herniation in these cases requires incontrovertible proof of disc protrusion.

    Area of Science:

    • Orthopedic Surgery
    • Radiology
    • Spinal Anatomy

    Background:

    • Lumbar disc herniation is a common surgical indication.
    • Lumbosacral transitional vertebrae are an anatomical variation that can affect spinal biomechanics.
    • The appearance of discs adjacent to transitional vertebrae can be atypical.

    Purpose of the Study:

    • To investigate the characteristics of discs associated with lumbosacral transitional vertebrae.
    • To evaluate the diagnostic accuracy of imaging and surgical findings for herniation in these specific discs.
    • To propose a classification for disc types found beneath transitional vertebrae.

    Main Methods:

    • Retrospective review of 200 patient records with lumbar disc herniation.
    • Analysis of charts and roentgenograms.

    Related Experiment Videos

  • Identification of patients with lumbosacral transitional vertebrae (n=42).
  • Review of myelographic and surgical findings for discs beneath transitional vertebrae.

    • Main Results:

    • Forty-two patients had lumbosacral transitional vertebrae.
    • Discs beneath these vertebrae showed varied appearances, leading to a proposed four-type classification.
    • None of the 42 patients demonstrated myelographic evidence of herniation in these discs.
    • Surgical inspection in five cases revealed no disc protrusion.

    Conclusions:

    • Discs associated with lumbosacral transitional vertebrae may mimic herniation but often lack definitive evidence.
    • Preoperative diagnostic certainty is crucial before surgical intervention on these specific discs.
    • A proposed classification aids in describing disc morphology in this population.