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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

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Published on: January 29, 2014

[Mixed cryoglobulinemia].

R Roque¹, S Ramiro, F Vinagre

¹Serviço de Reumatologia, Hospital Garcia de Orta, Almada, Portugal. raquelroque@sapo.pt

Acta Reumatologica Portuguesa

|November 25, 2011

Summary

This summary is machine-generated.

Cryoglobulinemia, a rare condition, presents diverse symptoms and requires tailored treatment. One patient with idiopathic mixed cryoglobulinemia died despite aggressive therapy, while another with Hepatitis C-associated cryoglobulinemia improved with antiviral treatment.

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Area of Science:

Nephrology
Rheumatology
Hepatology

Background:

Cryoglobulinemia is a systemic vasculitis characterized by the presence of cryoglobulins in the serum.
It can be associated with infections, autoimmune diseases, and lymphoproliferative disorders.
Hepatitis C virus (HCV) infection is a common cause of mixed cryoglobulinemia.

Observation:

The first case involved a 70-year-old woman with idiopathic mixed cryoglobulinemia presenting with skin ulcers, arthralgias, and constitutional symptoms.
Despite treatment with corticosteroids, cyclophosphamide, and plasmapheresis, she succumbed to septic shock.
The second case involved a 41-year-old woman with untreated HCV who developed petechiae, livedoid lesions, and peripheral neuropathy, leading to intestinal necrosis.

Findings:

The patient with HCV-associated cryoglobulinemia showed improvement with antiviral therapy (ribavirin and pegylated interferon-alpha).
The idiopathic cryoglobulinemia case demonstrated a poor prognosis despite multi-agent immunosuppressive therapy and plasmapheresis.
Diagnostic workup revealed anemia, elevated inflammatory markers, positive rheumatoid factor, and low C4 complement levels in both patients.

Implications:

This highlights the critical role of identifying and treating underlying causes, such as HCV, in cryoglobulinemia management.
Treatment strategies for cryoglobulinemia should be individualized based on the underlying etiology and disease severity.
The contrasting outcomes underscore the challenges in managing severe or idiopathic forms of cryoglobulinemia.