title: [Primary retroperitoneal tumors. Apropos of 11 cases].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D011379:Prognosis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery
vernacular_title: Tumores retroperitoneales primitivos. A propósito de 11 casos.