title: [Crossed renal ectopia in a patient with a complicated sigma neoplasia].
abstract: BACKGROUND
  Crossed renal ectopia is a rare pathology that is often asymptomatic. Intraoperative detection with a sigma complicated neoplasia is more infrequent and requires correct management to avoid a renal ureteral injury.
  
  
  OBJECTIVE
  To present a case report of a patient with a sigma complicated neoplasia and a crossed renal ectopia detected incidentally.
  
  
  METHODS
  We present the case of a 62-year-old man that was submitted for emergency surgery for a sigma perforated neoplasm, and who presented with a previously undiagnosed left-side CRE. During surgery there was a need to insert 2-double-J stents as a guide to both ureters and to avoid any injury to them.
  
  
  CONCLUSIONS
  Crossed renal ectopia is a rare, often asymptomatic entity, the diagnosis of which is usually incidental. In our case, the detection of a concomitant complicated neoplasm, required identification of both ureters due the anatomic doubt of its localization and to avoid them being injured. In conclusion, upon finding a casual crossed renal ectopia during an emergency surgery of sigma, we recommend the identification of the ureters to facilitate its location and to avoid any injury to the ureters.
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España. Electronic address: l.eduardopesan@gmail.com.
authors.forename: Luis Eduardo
authors.initials: LE
authors.lastname: Pérez-Sánchez
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Burneo-Esteves
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España.
authors.forename: Adriá
authors.initials: A
authors.lastname: Rosat-Rodrigo
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España.
authors.forename: Caleb
authors.initials: C
authors.lastname: Baz-Figueroa
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España.
authors.forename: Antonio Dámaso
authors.initials: AD
authors.lastname: Pérez-Álvarez
authors.affiliation: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Tenerife, España.
authors.forename: Manuel Ángel
authors.initials: MÁ
authors.lastname: Barrera-Gómez
mesh_terms: D000230:Adenocarcinoma / Q000150:complications* / Q000601:surgery; D002828:Choristoma / Q000150:complications / Q000175:diagnosis*; D004630:Emergencies; D006801:Humans; D033162:Incidental Findings; D007416:Intestinal Perforation / Q000209:etiology; D007431:Intraoperative Complications / Q000517:prevention & control; D007668:Kidney; D008297:Male; D008875:Middle Aged; D012810:Sigmoid Diseases / Q000209:etiology; D012811:Sigmoid Neoplasms / Q000150:complications* / Q000601:surgery; D014513:Ureter / Q000002:abnormalities* / Q000000981:diagnostic imaging; D014546:Urinary Catheterization
keywords: Cateterismo ureteral; Complicated sigma neoplasia; Crossed renal ectopia; Ectopia renal cruzada; Neoplasia de sigma complicada; Ureteral catheterization