SNOMED CT

Last uploaded: January 16, 2025
Id http://purl.bioontology.org/ontology/SNOMEDCT/1234908005
http://purl.bioontology.org/ontology/SNOMEDCT/1234908005
Preferred Name

Congenital azygos continuation of inferior vena cava

Definitions
A rare vascular anomaly with characteristics of absence of the hepatic segment of the inferior vena cava and presence of an enlarged azygos vein (or in rare cases hemiazygos vein, if there is a left-sided inferior vena cava) draining the venous blood from the caudal segments. The post-hepatic segment of the inferior vena cava is present, draining only the hepatic veins into the right atrium. Most patients remain asymptomatic, if the anomaly is isolated. Association with congenital heart disease and asplenia or polysplenia syndromes has been reported.
Synonyms
Inferior vena cava interruption with azygos continuation
Azygos continuation of inferior caval vein
Congenital azygos continuation of inferior vena cava (disorder)
Type http://www.w3.org/2002/07/owl#Class
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