Renal lesions in non-Hodgkin's lymphoma are rare. Furthermore, to the best of our knowledge, only 5 cases of crescentic glomerulonephritis associated with non-Hodgkin's lymphoma have been previously described. We report a case of crescentic glomerulonephritis and renal failure which preceded the diagnosis of non-Hodgkin's lymphoma. Following steroid therapy there was a resolution of these histological findings a year later.