title: Circular calcification in the mediastinum.
mesh_terms: D001013:Aorta, Thoracic; D001014:Aortic Aneurysm / Q000150:complications / Q000000981:diagnostic imaging*; D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000209:etiology; D002932:Cineangiography; D003937:Diagnosis, Differential; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008477:Mediastinal Diseases / Q000000981:diagnostic imaging*; D008875:Middle Aged