Infectious mononucleosis associated with a mass in the anterior mediastinum.
D000328:Adult; D006801:Humans; D007244:Infectious Mononucleosis / Q000150:complications*; D008198:Lymph Nodes; D008297:Male; D008477:Mediastinal Diseases / Q000209:etiology*; D008482:Mediastinum / Q000000981:diagnostic imaging; D011859:Radiography