Vascular anomalies associated with hepatic shunting

Table 1 Morgan and Superina extrahepatic shunts

Morgan and Superina extrahepatic shunts
Type I: “Abernethy malformation” portal blood flow bypasses the liver entirely and empties into the IVC
The splenic vein and SMV enter the IVC separately
The splenic vein and SMV form common vessel before entering IVC
Type II: Partial shunt where an “H type” connection between the portal system and the IVC. Some portal flow to the liver is still intact

IVC: Inferior vena cava; SMV: Superior mesenteric veins.