title: Percutaneous unroofing of renal simple cysts: Experience from one centre.
abstract: OBJECTIVE
  To assess the efficacy of percutaneous unroofing (PU) for treating simple renal cysts, compared with laparoscopic decortication and open surgery.
  
  
  METHODS
  From November 2009 to October 2010, 11 patients with 12 simple cysts in renal units were managed by PU. All cysts were evaluated with ultrasonography and abdominal computed tomography. A standard transurethral resectoscope was used to resect the cyst wall, and the parenchymal portion of the cyst was subsequently cauterised. A drain was left in place for 2 days. Success was defined as a >50% reduction in cyst diameter.
  
  
  RESULTS
  At the 5-month follow-up, patients were asked about their symptoms and assessed by ultrasonography. Of the 12 cyst units, eight were completely resolved, three were reduced to <50% in diameter and one was persistent, close to the original size.
  
  
  CONCLUSIONS
  Simple renal cysts can be managed safely by PU, with a success rate of >90%. This technique offers several advantages over open surgery, with a shorter hospital stay, improved convalescence and reduced risk of complications. PU also avoids the multiple trocar sites, extensive dissection, and technical difficulty associated with laparoscopy.
authors.affiliation: Department of Urology, Imam Medical Centre, Urmia University of Medical Sciences, Ershad Blvd, Urmia, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Tehranchi
authors.affiliation: Department of Urology, Imam Medical Centre, Urmia University of Medical Sciences, Ershad Blvd, Urmia, Iran.
authors.forename: Sepehr
authors.initials: S
authors.lastname: Hamedanchi
authors.affiliation: Department of Urology, Imam Medical Centre, Urmia University of Medical Sciences, Ershad Blvd, Urmia, Iran.
authors.forename: Afshin
authors.initials: A
authors.lastname: Badalzadeh
keywords: Decortication; PU, percutaneous unroofing; Percutaneous resection; Simple renal cyst; US, ultrasonography; Unroofing