Table 1 Morgen and Superina[3]classification of congenital extra hepatic portosystemic shunt
Extra hepatic portosystemic shunts | Â |
|---|---|
Type I | Absence of intrahepatic portal veins |
  Type I a | Superior mesenteric and splenic vein drain separately |
| Â | into inferior vena cava |
  Type I b | Superior mesenteric vein and splenic vein form a common |
| Â | Trunk before draining into the inferior vena cava |
Type II | Important collateral, patent intrahepatic veins |