Primary retroperitoneal tumours.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008223:Lymphoma / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000188:drug therapy / Q000196:embryology / Q000401:mortality / Q000532:radiotherapy / Q000601:surgery / Q000628:therapy*; D012509:Sarcoma / Q000628:therapy*