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Related Experiment Videos

Computed tomography after lumbar disc surgery.

E Ilkko1, S Lähde, J Koivukangas

  • 1Department of Diagnostic Radiology, University Central Hospital, Oulu, Finland.

Acta Radiologica (Stockholm, Sweden : 1987)
|March 1, 1988
PubMed
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Computed tomography (CT) scans after lumbar disc surgery reveal persistent abnormalities, including posterior mass lesions, even years later. These CT findings can indicate recurrent disc prolapse but are insufficient for diagnosing discitis.

Area of Science:

  • Radiology
  • Neurosurgery
  • Orthopedics

Background:

  • Lumbar disc surgery is common, but post-operative imaging interpretation requires understanding expected changes.
  • Distinguishing between normal post-surgical findings and complications like recurrent disc prolapse or infection is crucial.

Purpose of the Study:

  • To analyze computed tomography (CT) findings in patients after lumbar disc surgery.
  • To identify characteristic CT features of recurrent disc prolapse and assess their persistence over time.
  • To evaluate the diagnostic utility of CT findings for discitis.

Main Methods:

  • Retrospective analysis of CT scans from 53 patients early after surgery (1 week) and 43 patients late after surgery (6 months to 20 years).
  • Evaluation of surgical changes (laminotomy/laminectomy, gas bubbles), posterior disc mass lesions, disc hypodensity, and vacuolization.

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  • Correlation of CT findings with clinical outcomes and diagnosis of recurrent prolapse or discitis.

    • Main Results:

    • A posterior mass lesion at the disc was present in all patients post-surgery.
    • Early post-operative CT showed surgical changes and mass lesions; late findings were less pronounced but never completely normal.
    • Findings suggestive of recurrent prolapse included specific attenuation values and lack of contrast enhancement within the mass.
    • Disc interspace hypodensity was observed, associated with discitis but not diagnostic on its own.

    Conclusions:

    • CT imaging after lumbar disc surgery consistently shows abnormalities, including mass lesions, that persist long-term.
    • Specific CT characteristics can help identify recurrent disc prolapse.
    • Disc interspace hypodensity is a non-specific finding and requires further investigation for discitis diagnosis.