title: Renal arteriovenous fistulas and aneurysm: sonographic findings.
abstract: Two cases of congenital renal arteriovenous fistula and one case of intrarenal arterial aneurysm that were prospectively evaluated by real-time sonography are presented. The cirsoid type arteriovenous fistula had a characteristic sonographic appearance and was seen as a cluster of tubular anechoic structures within the kidney; it was supplied by an enlarged renal artery and drained by a dilated renal vein. Both the fistula (aneurysmal type) and the renal artery aneurysm were associated with a peripheral thrombus in the wall of the aneurysm and a central tubular anechoic lumen. The arterial aneurysm was also associated with visible pulsations on real-time sonograms. When present, the sonographic features as seen in these cases should facilitate a correct diagnosis, or at least suggest a renal lesion of vascular origin to be confirmed by renal angiography.
mesh_terms: D000328:Adult; D000368:Aged; D001165:Arteriovenous Malformations / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000002:abnormalities*; D012082:Renal Veins / Q000002:abnormalities*; D014463:Ultrasonography