[Retroperitoneal tumors].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D012737:Sex Factors