title: [Primary retroperitoneal tumors of the abdomen].
mesh_terms: D000008:Abdominal Neoplasms / Q000601:surgery*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008080:Liposarcoma / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000601:surgery*; D013997:Time Factors; D014567:Urography
vernacular_title: Pierwotne guzy zaotrzewnowe jamy brzusznej.