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Acute kidney injury (AKI) because of bilateral renal infiltration is an uncommon presentation of diffuse large B-cell lymphoma (DLBCL). A 52-year-old man presented to our institution with AKI and complaints of fatigue. Ultrasonography revealed a large, 15 cm granulomatous mass arising from the bilateral kidneys. The mass was biopsied laparoscopically, and histopathological analysis revealed evidence of DLBCL. The patient subsequently underwent R-CHOP therapy (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone). Chemotherapy resulted in a rapid decrease in mass size and improvement in kidney function. However, after five courses of R-CHOP, relapse was observed in the central nervous system, and the patient died 220 days after the initial onset of AKI. Post-mortem analysis of renal tissue confirmed the initial diagnosis of DLBCL-associated renal infiltration. To our knowledge, this is the first report of DLBCL presenting as bilateral renal infiltration and AKI.

Diffuse large B-cell lymphoma presenting as bilateral renal infiltration leading to acute kidney injury