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[Multiple complications of monoclonal IgM]
M Soubrier1, J J Dubost, P Jouanel
1Service de rhumatologie, hôpital G-Montpied, CHRU de Clermont-Ferrand, France.
La Revue De Medecine Interne
|January 1, 1994
Summary
This study details a rare case of monoclonal IgM Kappa cryoglobulinemia presenting with neurologic, vascular, and bone issues. The patient
Area of Science:
- Hematology
- Neurology
- Rheumatology
Background:
- Monoclonal gammopathies, including IgM Kappa cryoglobulinemia, can manifest with diverse systemic complications.
- Cryoglobulinemia is characterized by the presence of cryoglobulins in the blood, leading to potential vascular and organ damage.
Observation:
- A 64-year-old woman presented with a rare combination of neurologic, vascular, and bone manifestations attributed to IgM Kappa cryoglobulinemia.
- Neurologic involvement presented as polyneuropathy, distinct from typical cryoglobulinemic neuropathy and consistent with anti-MAG (myelin-associated glycoprotein) neuropathy.
- Vascular complications included occlusion, a known feature of dysglobulinemias.
- Bone involvement manifested as diffuse osteosclerosis without myelofibrosis or myeloproliferative disorder, resembling findings in Schnitzler's syndrome.
Findings:
- The patient's polyneuropathy was identified as IgM anti-MAG neuropathy.
- Diffuse osteosclerosis was observed, presenting a clinical picture similar to Schnitzler's syndrome.
- The co-occurrence of these specific manifestations in IgM Kappa cryoglobulinemia was noted as rare.
Implications:
- This case highlights the complex and varied clinical spectrum of monoclonal IgM Kappa cryoglobulinemia.
- It underscores the importance of differentiating specific neuropathic mechanisms (e.g., anti-MAG) from direct cryoglobulinemic effects.
- The findings suggest a potential overlap or shared pathogenetic pathways between certain monoclonal gammopathies and conditions like Schnitzler's syndrome.