title: [Extra-adrenal retroperitoneal paraganglioma].
abstract: OBJECTIVE
  To report a case of paraganglioma localized in the organ of Zuckerkandl and to discuss its diagnosis, treatment and outcome.
  
  
  RESULTS
  A 37-year-old female presented with a periumbilical mass and pain that radiated to the lumbar region for the past three months. Abdominal US and CT disclosed a well vascularized mass lying adjacent to the aorta, 1 cm from its bifurcation. At laparotomy, an 8 x 10 cm tumor was discovered at the aortic bifurcation that displaced the left ureter and included the inferior mesenteric artery. Pathological analysis of the surgical specimen revealed a paraganglioma.
  
  
  CONCLUSIONS
  Extra-adrenal paraganglioma should be taken into account in the differential diagnosis of retroperitoneal masses, particularly those adjoining the abdominal aorta.
authors.affiliation: Departamento de Cirugía General, Hospital Universitario La Paz, Facultad de Medicina, Universidad Autónoma de Madrid, España.
authors.forename: M I
authors.initials: MI
authors.lastname: Prieto Nieto
authors.forename: J P
authors.initials: JP
authors.lastname: Pérez Robledo
authors.forename: D
authors.initials: D
authors.lastname: Hardisson
authors.forename: J L
authors.initials: JL
authors.lastname: Palenzuela Fernández
authors.forename: M
authors.initials: M
authors.lastname: Nistal Martín
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010235:Paraganglioma / Q000473:pathology / Q000601:surgery; D012186:Retroperitoneal Neoplasms / Q000473:pathology / Q000601:surgery
vernacular_title: Paraganglioma retroperitoneal extraadrenal.