What is the diagnosis? Adrenal carcinoma Autosplenectomy Diverticular abscess Emphysematous pyelonephritis Renal vein thrombosis ( Blood tests showed leukocytosis and hyperglycemia. Urinary microscopy revealed pyuria. Unenhanced computed tomography was performed and revealed extensive gas collection in the parenchyma of the left kidney, the perinephric space, and the left renal vein, with corresponding hydronephrosis and hydroureter. )