title: Case 21-1979--aneurysmal dilatation of the aorta with aortic regurgitation.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001013:Aorta, Thoracic; D001014:Aortic Aneurysm / Q000175:diagnosis / Q000209:etiology*; D001019:Aortic Rupture / Q000175:diagnosis*; D001022:Aortic Valve Insufficiency / Q000209:etiology*; D001167:Arteritis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D013167:Spondylitis, Ankylosing / Q000150:complications*