Fig. 1
From: Varicocele due to renal arteriovenous malformation mimicking a renal tumor: a case report
a Physical examination showed grade 3 left varicocele. b Computed tomography showed early enhanced dilated renal vein (blue arrow) and irregular lesion in the upper pole of left kidney, which consisted of unusual dilated enhanced vessel (green arrow) in renal cortical phase. c T2 magnetic resonance imaging showed abnormal early flow voids (green arrows) in the upper pole of left kidney