title: [Primary tumors of the retroperitoneal space].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000532:radiotherapy / Q000601:surgery*; D013997:Time Factors
vernacular_title: Pierwotne guzy zaotrzewnowe.