title: [Primary retroperitoneal tumors. Study and treatment of 31 cases. Review of the literature].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed
vernacular_title: Tumores retroperitoneales primarios. Estudio y tratamiento de 31 casos Revisión de la literatura.