RESUMEN
Malignant lymphomas can involve any organ, but rarely cause acute renal failure as an initial manifestation. Impaired renal function secondary to renal arterial compression by a tumor mass has not been reported. A 50-year-old man was admitted with low back pain, weight loss, and a palpable abdominal mass. He developed non-oliguric acute renal failure secondary to extrinsic compression of the left renal artery by enlarged lymph nodes in the posterior wall of the pelvic cavity. Abdominal computed tomography (CT) showed the complete absence of perfusion of the left kidney due to extrinsic compression of the left renal artery by a huge diffuse large B cell lymphoma (stage IVa, International Prognostic Index score 3). We report a case of malignant lymphoma presenting as acute renal failure due to extrinsic compression of the left renal artery; this was treated successfully with systemic combination chemotherapy