title: [Retroperitoneal tumors: diagnostic problems].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed
vernacular_title: Tumori retroperitoneali: problemi di diagnosi.