title: Supravalvular aortic stenosis in a twin.
abstract: A case of subvalvular aortic stenosis in one of a set of dissimilar twins is reported. The case is discussed in terms of the aetiological factors involved and supports the view that supravalvular aortic stenosis is not environmental and may be genetic in origin.
mesh_terms: D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000235:genetics*; D002648:Child; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D008297:Male; D011859:Radiography; D013577:Syndrome