title: First percutaneous computed tomography-guided radiofrequency ablation of renal tumor in horseshoe kidney.
abstract: OBJECTIVE
  To report the first case of percutaneous radiofrequency ablation of a tumor in a horseshoe kidney.
  
  
  METHODS
  A 75-year-old man presented with a 3-cm solid mass on the isthmus of a horseshoe kidney. The tumor was discovered incidentally on a routine computed tomography scan performed during follow-up of a colon carcinoma treated with open hemicolectomy. The patient presented a high anesthetic risk (American Society of Anesthesiologists score of 3) because of a comorbid cardiovascular condition. Biopsy of the mass revealed type I papillary carcinoma. We performed percutaneous radiofrequency ablation using a posterior approach.
  
  
  RESULTS
  No complications occurred, and postoperative computed tomography 3 months after the procedure showed no significant contrast enhancement in the treated area.
  
  
  CONCLUSIONS
  To our knowledge, this is the first case of a tumor in a horseshoe kidney satisfactorily treated with percutaneous radiofrequency ablation. The technique could represent an alternative to traditional surgery in selected cases.
authors.affiliation: Servicio de Urología, Hospital General Universitario Gregorio Marañón, Madrid, Spain. adrhusillos@hotmail.com
authors.forename: Adrián
authors.initials: A
authors.lastname: Husillos-Alonso
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Bueno-Chomón
authors.forename: Enrique
authors.initials: E
authors.lastname: Lledó-García
authors.forename: David
authors.initials: D
authors.lastname: Subirá-Ríos
authors.forename: Enrique
authors.initials: E
authors.lastname: Ramón-Botella
authors.forename: Carlos
authors.initials: C
authors.lastname: Hernández-Fernández
mesh_terms: D000368:Aged; D002291:Carcinoma, Papillary / Q000150:complications* / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods*; D006801:Humans; D007668:Kidney / Q000002:abnormalities*; D007680:Kidney Neoplasms / Q000150:complications* / Q000601:surgery*; D008297:Male; D014057:Tomography, X-Ray Computed