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Encephalopathy in scleromyxedema.

K Johkura1, K Susuki, O Hasegawa

  • 1Department of Neurology, Urafune Hospital, Yokohama City University, Yokohama, Japan.

Neurology
|September 25, 1999
PubMed
Summary

Scleromyxedema encephalopathy involves elevated cerebrospinal fluid (CSF) protein and immunoglobulin G (IgG) during episodes. Interleukin-6 (IL-6) may play a role in this neurological complication.

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Area of Science:

  • Neurology
  • Immunology
  • Dermatology

Background:

  • Scleromyxedema is a rare, chronic autoimmune disease characterized by excessive deposition of mucin in the dermis.
  • Encephalopathy is a serious neurological complication that can occur in patients with scleromyxedema, but its underlying mechanisms are not fully understood.

Observation:

  • Cerebrospinal fluid (CSF) was monitored for over 5 months in a patient with fatal scleromyxedema experiencing two episodes of encephalopathy.
  • During both encephalopathy episodes, CSF analysis revealed elevated total protein and immunoglobulin G (IgG) levels.

Findings:

  • Despite elevated CSF protein and IgG, the IgG index and IgG synthesis rate remained normal, suggesting a localized intrathecal process.
  • A significant, CSF-dominant increase in interleukin-6 (IL-6) concentration was observed specifically during the encephalopathy episodes.

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  • These findings indicate a potential disruption of the blood-brain barrier during encephalopathy.

    • Implications:

    • The data suggest that elevated IL-6 in the CSF may be a key mediator in the pathogenesis of encephalopathy associated with scleromyxedema.
    • Understanding these mechanisms could lead to targeted therapies for neurological complications in rare autoimmune diseases.
    • Further research is warranted to elucidate the precise role of IL-6 and blood-brain barrier integrity in scleromyxedema-related encephalopathy.