Thymoma arising from undescended cervical thymus.
D000013:Congenital Abnormalities / Q000473:pathology; D003937:Diagnosis, Differential; D006222:Hamartoma / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D013945:Thymoma / Q000175:diagnosis / Q000196:embryology* / Q000473:pathology; D013950:Thymus Gland / Q000002:abnormalities / Q000473:pathology; D013953:Thymus Neoplasms / Q000175:diagnosis / Q000196:embryology* / Q000473:pathology