Huge renal arteriovenous malformation mimicking a simple para-pelvic cyst

The presenting symptoms of renal arteriovenous malformation are usually gro ss hematuria and hypertension. Herein we present an unusual case of a huge renal arteriovenous malformation without these signs, but with an ultrasoun d picture mimicking a simple para-pelvic cyst. Other imaging tests, includi ng duplex ultrasound, computerized tomography and aortography, demonstrated the vascular lesion. We suggest that duplex ultrasound should accompany ro utine renal ultrasound in order not to miss such cases, especially when the physical examination suggests an intra-abdominal vascular lesion or bleedi ng. Copyright (C) 2001 S. Karger AG, Basel.