alexa Increased risks of lymphoma and death among patients with non-hepatitis C virus-related mixed cryoglobulinemia.
Nephrology

Nephrology

Journal of Nephrology & Therapeutics

Author(s): Saadoun D, Sellam J, GhillaniDalbin P, Crecel R, Piette JC,

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Abstract BACKGROUND: Data on essential mixed cryoglobulinemia (MC) are scarce, and most date back to studies before 1989 (ie, before the discovery of hepatitis C virus [HCV] infection). Our objective was to describe the spectrum of MC in the era of HCV infection. METHODS: Retrospective study from a single university hospital's database of 1434 patients who tested positive for MC between January 1989 and December 2003. RESULTS: One hundred thirty-three patients (9\%) with persistent MC without HCV were included in the study. Sixty-five of 133 patients who fulfilled the criteria for MC vasculitis were compared with 118 patients with HCV-related MC vasculitis. The patients without HCV had increased frequencies of renal involvement and B-cell non-Hodgkin lymphoma (NHL), lower gammaglobulin levels, and higher death rates. Twenty-three of the patients had B-cell NHL (primarily of the lymphoplasmocytic and marginal zone types), and 8 patients had Sjögren syndrome. In multivariate analysis, a cryoglobulin level higher than 0.6 g/L (odds ratio [OR], 1.44) and the presence of MC vasculitis (OR, 4.3) and hypogammaglobulinemia (OR, 6.7) were independently associated with B-cell NHL. After a mean follow-up of 49.4 months, 18 (14\%) of 133 patients had died, primarily of sepsis. In multivariate analysis, age at diagnosis older than 60 years (OR, 1.06) and renal involvement (OR, 5.20) were independently associated with death. CONCLUSION: Patients with non-HCV-related MC vasculitis have a poor outcome and have a 4-fold increased risk of developing B-cell NHL. This article was published in Arch Intern Med and referenced in Journal of Nephrology & Therapeutics

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