Extragonadal germ cell tumours.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000628:therapy; D008875:Middle Aged; D009373:Neoplasms, Germ Cell and Embryonal / Q000175:diagnosis / Q000628:therapy*; D012186:Retroperitoneal Neoplasms / Q000628:therapy