Idiopathic dilatation of the pulmonary artery.
D006328:Cardiac Catheterization; D003937:Diagnosis, Differential; D006326:Heart Auscultation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011859:Radiography; D014652:Vascular Diseases / Q000175:diagnosis