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Peripheral neuropathy in hepatitis C virus infection with and without cryoglobulinaemia

R Nemni1, L Sanvito, A Quattrini

  • 1Department of Neurorehabilitation, IRCCS Don C Gnocchi Foundation, University of Milan, Italy. raffaello.nemni@unimi.it

Journal of Neurology, Neurosurgery, and Psychiatry
|August 23, 2003
PubMed

Insights

Hepatitis C virus (HCV) infection is linked to cryoglobulinemia (CG), increasing peripheral neuropathy (PN) risk. Nerve damage in HCV-associated CG and PN appears ischemic, not directly viral.

Area of Science:

  • Hepatology
  • Neurology
  • Immunology

Background:

  • Hepatitis C virus (HCV) infection frequently co-occurs with cryoglobulinemia (CG).
  • Peripheral neuropathy (PN) is a known complication of HCV-associated CG, often attributed to nerve ischemia.
  • Recent findings suggest a potential direct role of HCV in PN pathogenesis.

Purpose of the Study:

  • To determine the prevalence of CG in HCV patients.
  • To clarify the mechanism by which HCV contributes to PN.
  • To assess the relationship between CG and PN in HCV infection.

Main Methods:

  • Clinical, laboratory, and electrophysiological assessments of 51 HCV patients.
  • Sural nerve biopsy with morphological and morphometric evaluation in 28 patients.
  • Statistical analysis of clinical and pathological findings.

Main Results:

  • Cryoglobulinemia (CG) was detected in 78% of HCV patients.
  • Polyneuropathy was significantly more common in patients with CG (40%) compared to those without (11%).
  • Nerve biopsies revealed ischemic nerve damage in both CG+ and CG- patients, with more severe involvement in CG+ cases.

Conclusions:

  • Cryoglobulinemia (CG) presence is a negative predictive factor for associated peripheral neuropathy (PN) in HCV infection.
  • Morphological findings support an ischemic mechanism for nerve damage.
  • Evidence does not support a direct viral role of HCV in causing PN.
Abstract

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