Noninvasive imaging findings of idiopathic renal arteriovenous fistula.
Renal arteriovenous fistula (AVF) is an uncommon clinical entity, which can be congenital, acquired, or idiopathic. Diagnosis is aided by radiological studies, with digital subtraction angiography as a gold standard. However, Doppler ultrasound with color Doppler interrogation and computed tomography (CT) angiography are alternative imaging techniques that are noninvasive and can be used for patients to whom no intervention is planned. In this report, we present a case of idiopathic renal AVF diagnosed by Doppler ultrasound and CT angiography. Grayscale ultrasound showed a cyst-like lesion which was confirmed to be a focal aneurysmatic dilatation with heterogeneous fill-in and turbulent blood flow on color Doppler and spectral analysis. CT angiography demonstrated multiple aneurysmatic dilatations of the segmental branch and early opacification of right renal vein on the arterial phase, consistent with renal AVF.
Dönmez
Fuldem Yildirim
FY
Department of Radiology, Başkent University School of Medicine, Ankara, Turkey.
Coşkun
Mehmet
M
Uyuşur
Arzu
A
Hunca
Ciğdem
C
Tutar
Nihal Uslu
NU
Başaran
Ceyla
C
Cakir
Banu
B
D000328:Adult; D000792:Angiography; D001164:Arteriovenous Fistula / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D012077:Renal Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000002:abnormalities* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*; D018608:Ultrasonography, Doppler / Q000379:methods*; D018615:Ultrasonography, Doppler, Color / Q000379:methods