[Primary retroperitoneal sarcomas].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000601:surgery*; D012509:Sarcoma / Q000601:surgery*
I sarcomi primitivi del retroperitoneo.