DAAs resulted in high rates of SVR in patients with cryoglobulinemia. Safety and tolerability were excellent; however, most patients did not have a complete clinical or immunological response, suggesting a delay to clinical response particularly in those with severe/life-threatening vasculitis. Further follow-up will be required to determine if clinical improvement continues after viral clearance.

Background & Aims Chronic hepatitis B virus (HBV) infection is an important cause of cirrhosis and hepatocellular carcinoma worldwide; populations that migrate to the US and Canada might be disproportionately affected. The Hepatitis B Research Network (HBRN) is a cooperative network of investigators from the United States and Canada, created to facilitate clinical, therapeutic, and translational research in adults and children with hepatitis B. We describe the structure of the network and baseline characteristics of adults with hepatitis B enrolled in the network. Methods The HBRN collected data on clinical characteristics of 1625 adults with chronic HBV infection who are not receiving antiviral therapy from 21 clinical centers in North America. Results Half of the subjects in the HBRN are male, and the mean age is 42 years; 72% are Asian, 15% are Black, and 11% are White, with 82% born outside of North America. The most common HBV genotype was B (39%); 745 of subjects were negative for the hepatitis B e antigen. The median serum level of HBV DNA when the study began was 3.6 log10 IU/mL; 68% of male subjects and 67% of female subjects had levels of alanine aminotransferase above the normal range. Conclusions The HBRN cohort will be used to address important clinical and therapeutic questions for North Americans infected with chronic HBV and to guide health policies on HBV prevention and management in North America.

Epidemiologic studies have suggested an association between hepatitis C virus (HCV) infection and antigendriven lymphoproliferative disorders, in particular marginal zone lymphomas. Antiviral therapy has been shown to exert an anti-lymphoma effect in these indolent B-cell lymphoproliferations, with survival gains observed. However, these protocols have traditionally incorporated interferon. We describe a patient with chronic hepatitis C, immune thrombocytopenia, and splenic marginal zone lymphoma who, after eradication of HCV with sofosbuvir and ribavirin, exhibited complete remission of both hematologic conditions. With the numerous new potent drugs currently available, the future looks positive with highly efficacious interferon-free regimens for HCV therapy.

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