KRAS and membranoproliferative glomerulonephritis: The possible role of HCV/NS3 protein in the pathogenesis of HCV-associated MC is also suggested by another study evidencing NS3 deposits in the kidney of viremic HCV-positive patients with membranoproliferative glomerulonephritis associated with cryoglobulinemia and presenting a mild polyclonal B lymphocytosis [71].