Morgan and Superina classification of congenital extrahepatic portosystemic shunts

Changed by Patricia O'Gorman, 10 Jul 2017

Updates to Article Attributes

Body was changed:

Show markup changes

Congenital portosystemic shunts can be divided into extrahepatic and intrahepatic. Extrahepatic shunts are commonly referred to as Abernethy malformations. G Morgan and R Superina published the following classification¹:

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 through side-to-side extrahepatic communication

-<![endif]-->Congenital portosystemic shunts can be divided into extrahepatic and <a title="Congenital intrahepatic portosystemic shunt classification" href="/articles/congenital-intrahepatic-portosystemic-shunt-classification">i</a>ntrahepatic. Extrahepatic shunts are commonly referred to as <a title="Abernethy malformation" href="/articles/abernethy-malformation">Abernethy malformation</a>s. G Morgan and R Superina published the following classification1: <ul>
-<li>Type 1: complete diversion of portal blood into the <a title="Inferior vena cava" href="/articles/inferior-vena-cava-1">Inferior vena cava</a> with congenital absence of the <a title="portal vein" href="/articles/portal-vein">portal vein</a><ul>
-<li>1a: <a title="Superior mesenteric vein" href="/articles/superior-mesenteric-vein">Superior mesenteric vein</a> and <a title="splenic vein" href="/articles/splenic-vein">splenic vein</a> do not join to form a confluence</li>
+<![endif]-->Congenital portosystemic shunts can be divided into extrahepatic and <a href="/articles/congenital-intrahepatic-portosystemic-shunt-classification">i</a>ntrahepatic. Extrahepatic shunts are commonly referred to as <a href="/articles/abernethy-malformation">Abernethy malformation</a>s. G Morgan and R Superina published the following classification1: <ul>
+<li>Type 1: complete diversion of portal blood into the <a href="/articles/inferior-vena-cava-1">Inferior vena cava</a> with congenital absence of the <a href="/articles/portal-vein">portal vein</a><ul>
+<li>1a: <a href="/articles/superior-mesenteric-vein">Superior mesenteric vein</a> and <a href="/articles/splenic-vein">splenic vein</a> do not join to form a confluence</li>
-<li>Type 2: intact <a title="Portal vein" href="/articles/portal-vein">Portal vein</a> - may be hypoplastic - with some portal flow diverted to the <a title="inferior vena" href="/articles/inferior-vena">inferior vena</a> through side-to-side extrahepatic communication</li>
+<li>Type 2: intact <a href="/articles/portal-vein">Portal vein</a> - may be hypoplastic - with some portal flow diverted to the <a href="/articles/inferior-vena">inferior vena</a> through side-to-side extrahepatic communication</li>

References changed:

1. Morgan G, Superina R. Congenital absence of the portal vein: two cases and a proposed classification system for portasystemic vascular anomalies. Journal of pediatric surgery. 29 (9): 1239-41. <a href="https://www.ncbi.nlm.nih.gov/pubmed/7807356">Pubmed</a>
1. Morgan G, Superina R. Congenital absence of the portal vein: two cases and a proposed classification system for portasystemic vascular anomalies. Journal of pediatric surgery. 29 (9): 1239-41. <a href="https://www.ncbi.nlm.nih.gov/pubmed/7807356">Pubmed</a>
3. Morgan G, Superina R. Congenital absence of the portal vein: two cases and a proposed classification system for portasystemic vascular anomalies. Journal of pediatric surgery. 29 (9): 1239-41. <a href="https://www.ncbi.nlm.nih.gov/pubmed/7807356">Pubmed</a>

Systems changed: