There still remains the question if hepatitis C eradication with all oral therapy will lead to a regression or cure of the low grade lymphoma. Thus, the hypothesis of this study is that oral HCV therapy will lead to a high rate of hepatitis C eradication which will correlate with a reduction of the size and extent of low-grade lymphoma. The hypothesis of this study is that subjects with hepatitis C,regardless of genotype, who have low grade lymphoma, when treated for hepatitis C without pegylated interferon will have a regression of low grade non-Hodgkin's lymphoma. In this pilot study we will evaluate the effect of Sofosbuvir/ledipasvir or sofosbuvir/ribavirin based antiviral therapy on the course of a subset of HCV-related low grade B cell non-Hodgkin's lymphoma