CT OF THROMBOSED RENAL-VEIN PRESENTING AS A HYPERDENSE MASS

We report a patient with focal renal vein thrombosis that presented as a hyperdense mass mimicking a hyperdense cyst or a pelvic or parenchy mal tumor. The lesion was described as a well-defined round hyperdense mass in the right renal sinus on noncontrast CT and was surgically pr oven to be acute thrombosis of the renal vein. Renal vein thrombosis s hould be considered in the differential diagnosis of a hyperdense in t he renal sinus even if the patient has no underlying renal abnormality .