An Unusual Cause of Haematuria: Renal Arteriovenous Malformation Mimicking Caliceal Dilatation at Ultrasonography

Abstract

We report a 37-year-old woman admitted to the emergency service with macroscopic haematuria and flank pain due to renal arteriovenous malformation (AVM). Ultrasonography showed apparent dilatation of the left renal caliceal system, whereas intravenous pyelography (IVP) demonstrated multinodular pelvicaliceal impressions with no caliceal dilatation. The final diagnosis was established with conventional angiography. Renal AVM may mimic caliceal dilatation on ultrasonography. Demonstration of multinodular pelvicaliceal impressions at IVP and lack of caliceal dilatation are clues for the correct diagnosis in this particular situation.