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Spinal gas collection demonstrated at CT.

J Hjarbaek1, P W Kristensen, P Hauge

  • 1Department of Radiology, Vejle County Hospital, Denmark.

Acta Radiologica (Stockholm, Sweden : 1987)
|March 1, 1992
PubMed
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Gas collection in the spine, often seen with CT scans for herniated or protruding discs, is usually not clinically significant. However, in rare instances, intraspinal gas can mimic a spinal mass and cause severe symptoms.

Area of Science:

  • Radiology
  • Neurosurgery
  • Orthopedics

Background:

  • Gas collection within the spine is an uncommon finding on CT scans.
  • Its clinical significance in relation to spinal pathologies like disc herniation and protrusion is not well-established.

Purpose of the Study:

  • To investigate the prevalence and clinical relevance of gas collection in the lumbar spine.
  • To correlate CT findings of gas collection with surgical outcomes and patient symptoms.

Main Methods:

  • Retrospective review of 234 consecutive CT examinations of the lumbar spine.
  • Analysis of gas collection in intervertebral discs, facet joints, epidural space, and intraspinal locations.
  • Comparison of imaging findings with surgical results and clinical presentations.

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Main Results:

  • Gas collection was observed in 4 cases of disc herniation and 6 cases of disc protrusion.
  • Free gas in the epidural space occurred in 3 cases; one patient had an intraspinal gas-filled 'bleb'.
  • Gas in discs and facet joints was noted in 60 patients; most cases were clinically insignificant, except one mimicking a spinal mass causing pain and radiculopathy.

Conclusions:

  • While often an incidental finding, intraspinal gas can occasionally present as a symptomatic spinal mass.
  • CT imaging is crucial for identifying gas collection, but its clinical correlation is essential for accurate diagnosis and management.