摘要
Abernethy malformation （AM） is a rare congenital anomaly in which the splanchnic blood bypasses the liver and drains directly into the systemic veins.It was first described by Abemethy in 1793 and has two types.Type Ⅰ is characterized by a complete portosystemic shunt and an absence of a portal vein （consists of superior mesenteric and splenic veins）,while Type Ⅱ exhibits partial portosystemic shunt and a hypoplastic portal vein.Type Ⅰ is further subclassified into subtype a and b based on the absence or presence of a patent connection between the superior mesenteric vein and the splenic vein.
Abernethy malformation （AM） is a rare congenital anomaly in which the splanchnic blood bypasses the liver and drains directly into the systemic veins.It was first described by Abemethy in 1793 and has two types.Type Ⅰ is characterized by a complete portosystemic shunt and an absence of a portal vein （consists of superior mesenteric and splenic veins）,while Type Ⅱ exhibits partial portosystemic shunt and a hypoplastic portal vein.Type Ⅰ is further subclassified into subtype a and b based on the absence or presence of a patent connection between the superior mesenteric vein and the splenic vein.
