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Peripheral neuropathy in essential mixed cryoglobulinaemia
F Gemignani1, G Pavesi, A Fiocchi
1Institute of Neurology, University of Parma, Italy.
Journal of Neurology, Neurosurgery, and Psychiatry
|February 1, 1992
Summary
Peripheral neuropathy is common in essential mixed cryoglobulinaemia (EMC). Different EMC types show distinct neuropathy patterns, suggesting varied causes for cryoglobulinaemic neuropathy.
Area of Science:
- Neurology
- Immunology
Background:
- Peripheral neuropathy prevalence in essential mixed cryoglobulinaemia (EMC) is not well-established.
- Cryoglobulinaemia is associated with immune complex deposition and vasculitis.
Purpose of the Study:
- To assess the prevalence and characteristics of peripheral neuropathy in EMC patients.
- To investigate differences in neuropathy presentation across EMC subgroups (Type II and Type III).
Main Methods:
- Clinical and electrophysiological assessments of peripheral neuropathy in 37 EMC patients.
- Analysis of neuropathy patterns (polyneuropathy, mononeuropathy) in relation to EMC type.
- Review of patient demographics, inflammatory markers (ESR, IgM), and sural nerve biopsy findings.
Main Results:
- Peripheral neuropathy was found in 21 of 37 (57%) EMC patients.
- Type II EMC predominantly showed isolated polyneuropathy, while Type III EMC often presented with multifocal neuropathy.
- Patients with neuropathy were older and had higher ESR/IgM in Type III EMC.
Conclusions:
- Distinct pathogenic factors likely underlie neuropathy in Type II and Type III EMC.
- Different vascular changes may contribute to polyneuropathy versus mononeuropathy in cryoglobulinaemic neuropathy.