title: [Diagnosis of non-renal retroperitoneal tumors: usefulness of ultrasound and fine needle puncture].
authors.forename: D
authors.initials: D
authors.lastname: Busel
authors.forename: I
authors.initials: I
authors.lastname: Roa
mesh_terms: D000328:Adult; D000368:Aged; D001707:Biopsy, Needle; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000473:pathology*; D014463:Ultrasonography
vernacular_title: Diagnóstico de tumores retroperitoneales no renales: utilidad del ultrasonido y punción con aguja fina.