Primary diffuse large B-cell lymphoma of the bladder.

Primary lymphoma of the bladder is quite rare; primarily, it is extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT-lymphoma). There is only one case report of primary diffuse large B-cell lymphoma (DLBCL) of the bladder, accompanied by diffuse wall thickening of the bladder. Here, we report a second case of primary DLBCL of the bladder in a 75-year-old woman patient, whose initial presentation was acute renal failure. Three courses of R-CHOP chemotherapy were effective to treat acute renal failure caused by post-renal obstruction and to attain clinical remission.