Congenital extrahepatic portosystemic shunt classification

This congenital extrahepatic portosystemic shunt classification was proposed by Morgan and Superina in 1994 :

• type 1: complete diversion of portal blood into the inferior vena cava with congenital absence of the portal vein
  • 1a: superior mesenteric vein and splenic vein do not join to form a confluence
  • 1b: superior mesenteric vein and splenic vein joint to form a confluence
• type 2: intact portal vein (may be hypoplastic) with some portal flow diverted to the inferior vena cava through side-to-side extrahepatic communication

See also

• congenital portosystemic shunt