A 64-yr-old man with kidney transplant for ESRD as a result of diabetic nephropathy presented with acute renal failure, weakness, myalgia, and pigmented urine. His medications included mycophenolate, cyclosporine, prednisone, furosemide, diltiazem, aspirin, simvastatin, an angiotensin receptor blocker, and insulin. A renal biopsy was performed. Pathologic findings and differential diagnosis are discussed, and the literature is reviewed.
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