Abnormal lung morphology Abnormality of the vasculature Pulmonary artery stenosis 2008-03-18T09:28:00Z An abnormal narrowing or constriction of the pulmonary artery, in the main pulmonary artery and/or in the left or right pulmonary artery branches. UMLS:C0238397 Fyler:1622 Stenosis, or narrowing, of the branches of the pulmonary artery is a type of congenital heart disease that, if left untreated, may lead to significant complications. Ideally, interventions to treat stenosis occur before significant complications or long-term sequelae take place, often within the first 2 years of life. HP:0004415 Narrowing of lung artery SNOMEDCT_US:95441000 Abnormal cardiovascular system morphology