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IgM cryoglobulin deposits in the peripheral nerve.
A Vital1, C Vital, J M Ragnaud
1Department of Pathology, Hôpital Pellegrin, Bordeaux, France.
Virchows Archiv. A, Pathological Anatomy and Histopathology
|January 1, 1991
Summary
Waldenström's macroglobulinaemia can cause peripheral neuropathy due to IgM and kappa light chain deposits in nerves. These deposits, identified via immunofluorescence and electron microscopy, indicate the presence of cryoglobulin in the serum.
Area of Science:
- Neurology
- Immunology
- Hematology
Background:
- Waldenström's macroglobulinaemia is a rare B-cell lymphoproliferative disorder.
- Peripheral neuropathy is a potential complication of Waldenström's macroglobulinaemia.
Observation:
- Direct immunofluorescence of a peripheral nerve biopsy in an affected patient revealed significant endoneurial deposits of IgM and kappa light chains.
- Electron microscopy of these deposits showed a characteristic microtubular structure.
Findings:
- The observed microtubular structures in the endoneurium are indicative of cryoglobulin.
- Serum analysis confirmed the presence of cryoglobulin in the patient.
Implications:
- This case highlights the potential role of cryoglobulin in the pathogenesis of peripheral neuropathy associated with Waldenström's macroglobulinaemia.
- Understanding these immune complex deposits is crucial for diagnosing and potentially treating neuropathy in these patients.