Article,

Hepatitis C and non-Hodgkin lymphoma among 4784 cases and 6269 controls from the International Lymphoma Epidemiology Consortium.

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Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association, 6 (4): 451--458 (April 2008)
DOI: 10.1016/j.cgh.2008.02.011

Abstract

Increasing evidence points towards a role of hepatitis C virus (HCV) infection in causing malignant lymphomas. We pooled case-control study data to provide robust estimates of the risk of non-Hodgkin's lymphoma (NHL) subtypes after HCV infection. The analysis included 7 member studies from the International Lymphoma Epidemiology Consortium (InterLymph) based in Europe, North America, and Australia. Adult cases of NHL (n = 4784) were diagnosed between 1988 and 2004 and controls (n = 6269) were matched by age, sex, and study center. All studies used third-generation enzyme-linked immunosorbent assays to test for antibodies against HCV in serum samples. Participants who were human immunodeficiency virus positive or were organ-transplant recipients were excluded. HCV infection was detected in 172 NHL cases (3.60\%) and in 169 (2.70\%) controls (odds ratio OR, 1.78; 95\% confidence interval CI, 1.40-2.25). In subtype-specific analyses, HCV prevalence was associated with marginal zone lymphoma (OR, 2.47; 95\% CI, 1.44-4.23), diffuse large B-cell lymphoma (OR, 2.24; 95\% CI, 1.68-2.99), and lymphoplasmacytic lymphoma (OR, 2.57; 95\% CI, 1.14-5.79). Notably, risk estimates were not increased for follicular lymphoma (OR, 1.02; 95\% CI, 0.65-1.60). These results confirm the association between HCV infection and NHL and specific B-NHL subtypes (diffuse large B-cell lymphoma, marginal zone lymphoma, and lymphoplasmacytic lymphoma).

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