Thymolipoma.
D000293:Adolescent; D006801:Humans; D008067:Lipoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D011859:Radiography; D013945:Thymoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery