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Subacute inflammatory demyelinating polyneuropathy.

S J Oh1, K Kurokawa, D F de Almeida

  • 1Department of Neurology, University of Alabama at Birmingham, and Department of Veterans Affairs Medical Center, 35294, USA. shinjoh@uab.edu

Neurology
|December 10, 2003
PubMed
Summary
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Subacute inflammatory demyelinating polyneuropathy (SIDP) is a distinct neurological condition. It shares features with Guillain-Barré syndrome and chronic inflammatory demyelinating polyneuropathy, often showing significant recovery.

Area of Science:

  • Neurology
  • Clinical Electrophysiology
  • Histopathology

Background:

  • Subacute inflammatory demyelinating polyneuropathy (SIDP) is a rare neurological disorder.
  • Understanding its characteristics is crucial for accurate diagnosis and management.
  • SIDP presents a clinical challenge, bridging the gap between acute and chronic demyelinating neuropathies.

Purpose of the Study:

  • To delineate the clinical, electrophysiologic, and histologic features of SIDP.
  • To establish diagnostic criteria for SIDP.
  • To differentiate SIDP from other demyelinating polyneuropathies.

Main Methods:

  • Defined criteria for "definite SIDP" including progressive neuropathy (4-8 weeks), electrophysiologic demyelination, exclusion of other causes, and no relapse.

Related Experiment Videos

  • Supportive criteria included elevated cerebrospinal fluid protein and nerve biopsy findings.
  • Identified 16 "definite SIDP" patients from 29 "probable SIDP" cases.

    • Main Results:

    • An antecedent infection was noted in 38% of patients.
    • Symmetric motor-sensory or pure motor neuropathy were most common.
    • High cerebrospinal fluid protein (>55 mg/dL) was observed in 93%; demyelination confirmed in 88% of motor nerve conduction studies.
    • Complete recovery occurred in 69% of patients, with others showing partial recovery.

    Conclusions:

    • Subacute inflammatory demyelinating polyneuropathy (SIDP) is a distinct clinical entity.
    • SIDP is characterized by a higher rate of antecedent infection and a lack of relapse compared to CIDP.
    • The findings support SIDP as a bridge between Guillain-Barré syndrome and chronic inflammatory demyelinating polyneuropathy, with a favorable prognosis.