An unusual aberrant left subclavian artery.
In a child with tetraology of Fallot, pulmonary atresia, and right aortic arch, the left subclavian artery arose from an unusually low position, and was initially misinterpreted as a systemic pulmonary collateral. This anomaly probably resulted from a "lag" in embryological migration of the left subclavian artery onto the aortic arch.
D000015:Abnormalities, Multiple; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011664:Pulmonary Valve / Q000002:abnormalities / Q000000981:diagnostic imaging; D011859:Radiography; D013348:Subclavian Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013771:Tetralogy of Fallot / Q000150:complications / Q000000981:diagnostic imaging