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[Adhesive lumbar arachnoiditis]

C Ribeiro1, F C Reis

  • 1Serviço de Neurorradiologia, Hosptal de Santo António dos Capuchos, Lisboa.

Acta Medica Portuguesa
|May 16, 1998
PubMed
Summary
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Spinal arachnoiditis, an inflammation of the meninges, affects 6-16% of patients post-surgery. Magnetic Resonance Imaging (MRI) offers high accuracy in diagnosing this condition, distinguishing between different types.

Area of Science:

  • Neurology
  • Radiology
  • Pathology

Context:

  • Spinal arachnoiditis is an inflammatory condition affecting meninges and nerve roots.
  • It occurs in 6-16% of postoperative patients, with spinal surgery as a common cause.
  • Other causes include infection, intrathecal agents, trauma, hemorrhage, and contrast materials.

Purpose:

  • To review the causes, pathogenesis, and diagnostic methods for spinal arachnoiditis.
  • To compare myelographic and Magnetic Resonance Imaging (MRI) findings.
  • To highlight MRI's diagnostic performance.

Summary:

  • Spinal arachnoiditis pathogenesis resembles serous membrane repair, with fibrinous exudate.
  • Myelography classifies arachnoiditis into 'empty thecal sac' (Type 1) and filling defects (Type 2).

Related Experiment Videos

  • MRI shows high sensitivity (92%) and specificity (100%), with three distinct imaging groups corresponding to myelographic findings.

    • Impact:

    • Accurate diagnosis of spinal arachnoiditis is crucial for managing persistent postoperative symptoms.
    • MRI provides a sensitive and specific tool for identifying arachnoiditis.
    • Understanding MRI classifications aids in correlating findings with myelographic patterns.