HBV-associated cryoglobulinemic vasculitis: remission after antiviral therapy with entecavir.

BACKGROUND/AIMS Cryoglobulinemic vasculitis remains an uncommon complication of hepatitis B virus infection. METHODS We report the case of a 40-years old female Chinese patient with chronic hepatitis B developing cryoglobulinemic vasculitis with multiple organ involvement (liver, kidney, and skin) coupled with weakness, arthralgias, haemolytic anaemia, and autoimmune thyroiditis. She received entecavir mono-therapy at dose adjusted for estimated glomerular filtration rate. RESULTS Within five months of entecavir treatment, hepatitis B viraemia decreased below the limit of detection with normal serum amino-transferase levels, HBeAg clearance occurred, vasculitis regressed with disappearance of purpura and ascites; in addition, renal function normalized and nephritic syndrome remitted. After a five-year follow-up, the patient is asymptomatic with intact kidney function, proteinuria in the normal range, and normal liver biochemistry, despite the antiviral treatment was withdrawn and the patient remained HBsAg positive. CONCLUSIONS This is the second case of hepatitis B virus-related cryoglobulinemic vasculitis successfully treated with entecavir suggesting that effective antiviral therapy may counteract both the hepatic and extra-hepatic manifestations of infection by hepatitis B virus.