Fig. 2

Images of percutaneous transhepatic portography before and after angioplasty and 1-month follow-up US. a) Venography of the splanchnic venous system performed after transhepatic catheterization of the venous collateral (white arrow) originating from the mesenteric vein (arrowhead) shows stenotic confluence with the right portal branch (black arrow); the splenic and mesenteric veins present hepatofugal flow and merge into a dilated gastric vein with varices (black arrowhead); no portal vein origin is detectable at its conventional anatomic site. b) Control venography of the splanchnic venous system performed after angioplasty shows restoration of hepatopetal flow with no opacification of the splenic and gastric veins and varices. c) After one month the confluence between the mesenteric venous collateral and the right portal branch presents a 5-mm caliber with a flow velocity of 80 cm/s. SMV, superior mesenteric vein; SV, splenic vein