Diagnostic availability of magnetic resonance angiography (MRA) in a case of cirsoid-type renal arteriovenous fistula

We report a case of cirsoid-type renal arteriovenous fistula (RAVF), which was difficult to differentiate from renal pelvic tumor by intravenous pyelography and computed tomographic (CT) scan. A 76-year-old woman visited our department complaining of sudden asymptomatic macroscopic hematuria. A CT scan showed an irregular mass (3 x 2 x 2 cm) in the right kidney. MRA revealed a cirsoid-type renal arteriovenous fistula. The patient was treated with TAE using ethanol, geratin sponge, and a coil. It is suggested that MRA is useful for the diagnosis of renal arteriovenous fistula.