Anterior mediastinal lesion.
D001014:Aortic Aneurysm / Q000000981:diagnostic imaging; D003560:Cysts / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006548:Hernia, Diaphragmatic / Q000000981:diagnostic imaging; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D010496:Pericardium; D013902:Radiography, Thoracic; D013945:Thymoma / Q000000981:diagnostic imaging*; D013953:Thymus Neoplasms / Q000000981:diagnostic imaging*