title: Percutaneous intrarenal marsupialization of symptomatic peripelvic renal cysts: a single-centre experience in China.
abstract: OBJECTIVE.The aim of this study was to report the authors' experience with percutaneous intrarenal marsupialization of symptomatic peripelvic renal cysts.
  
  
  METHODS
  Thirty-one patients (16 male and 15 female, with a mean age of 49 years) with a peripelvic renal cyst associated with chronic flank or lumbar pain or urinary infection were selected for percutaneous intrarenal marsupialization with a 2 μm laser in the authors' centre from January 2005 to December 2010. Cyst size ranged from 4.5 to 10.5 (mean 6.0) cm. The cysts were punctured by a percutaneous technique guided by ultrasonography, a 20.8 F nephroscope was introduced and the whole internal surface of the cyst was inspected. Methylene blue was injected through the ureteral catheter to help identify the collecting system. A 1.5-4 cm incision was made at the avascular area of the cystic wall by the 2 μm laser to achieve intrarenal marsupialization of the cyst into the renal collecting system. One or two 6 F double-J stents were placed with the proximal end in the cyst for 2-3 months.
  
  
  RESULTS
  The mean operation time was 50 (25-120) min. No serious complications such as massive bleeding, urine leak or infected haematoma occurred. The patients were followed up for a mean of 12 (range 3-36) months. All patients were relieved of their symptoms. Eighteen cysts disappeared after surgery, while 13 cysts reduced in size by over one-third and communicated with the renal collecting system. No enlargement of cysts was observed.
  
  
  CONCLUSIONS
  Percutaneous intrarenal marsupialization with a 2 μm laser is an effective and safe procedure and may offer a minimally invasive alternative for the management of symptomatic peripelvic renal cysts.
authors: Department of Urology, Linyi People's Hospital, Shandong Province, Linyi, China.
authors: Zhi-Qiang
authors: ZQ
authors: Shao
authors: Feng-Fu
authors: FF
authors: Guo
authors: Wen-Yan
authors: WY
authors: Yang
authors: Guang-Jian
authors: GJ
authors: Wang
authors: Shan-Feng
authors: SF
authors: Tan
authors: Huai-Lan
authors: HL
authors: Li
authors: Xiang-Fei
authors: XF
authors: He
authors: Jian-Ming
authors: JM
authors: Wang
authors: Hong-Jun
authors: HJ
authors: Liu
authors: Shu-Jie
authors: SJ
authors: Xia
mesh_terms: D000328:Adult; D000368:Aged; D002681:China; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000000981:diagnostic imaging / Q000601:surgery*; D007682:Kidney Pelvis / Q000000981:diagnostic imaging / Q000601:surgery*; D010535:Laparoscopy / Q000379:methods*; D053685:Laser Therapy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014463:Ultrasonography; D055815:Young Adult