Morgan and Superina classification of congenital extrahepatic portosystemic shunts
Citation, DOI, disclosures and article data
At the time the article was created Patricia O'Gorman had no recorded disclosures.
View Patricia O'Gorman's current disclosuresAt the time the article was last revised Rohit Sharma had no financial relationships to ineligible companies to disclose.
View Rohit Sharma's current disclosures- Morgan classification of congenital extrahepatic portosystemic shunts
The Morgan and Superina classification of congenital extrahepatic portosystemic shunts is based on the absence (type 1) or presence (type 2) of intrahepatic portal blood supply 2.
On this page:
Usage
This classification system is widely used (c. 2020) 2, although there is evidence that all congenital extrahepatic portosystemic shunts have some portal blood supply even if very hypoplastic 3.
Classification
-
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 3
History and etymology
Morgan and Superina proposed this classification in 1994 1:
See also
References
- 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. Pubmed
- 2. Tang H, Song P, Wang Z et al. A Basic Understanding of Congenital Extrahepatic Portosystemic Shunt: Incidence, Mechanism, Complications, Diagnosis, and Treatment. Intractable Rare Dis Res. 2020;9(2):64-70. doi:10.5582/irdr.2020.03005 - Pubmed
- 3. Rajeswaran S, Johnston A, Green J et al. Abernethy Malformations: Evaluation and Management of Congenital Portosystemic Shunts. J Vasc Interv Radiol. 2020;31(5):788-94. doi:10.1016/j.jvir.2019.08.007 - Pubmed
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