title: Asymptomatic mediastinal mass in a 49-year-old man.
mesh_terms: D003560:Cysts / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D004938:Esophageal Neoplasms / Q000175:diagnosis; D006801:Humans; D008297:Male; D008477:Mediastinal Diseases / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011859:Radiography