title: The effectiveness of flexible ureterorenoscopy for opaque and non-opaque renal stones.
abstract: OBJECTIVE
  To evaluate the treatment success rate of flexible ureterorenoscopy (URS) for opaque and non-opaque renal stones.
  
  
  METHODS
  Ninety-four patients, who underwent flexible URS for renal stones between October 2012 and January 2014, were included. The patients were divided into two groups according to stone radiolucency. The patients were evaluated with preoperative and postoperative (at the weeks 4) computed tomography. Success of the treatment was defined as stone-free status and residual fragments &lt; 4 mm.
  
  
  RESULTS
  Success of the treatment was observed in 79 (84%) patients. Sex, stone size, and stone location were factors affecting treatment success. Seventy-five (79.8%) patients had opaque stones, and 19 (20.2%) had non-opaque stones. The treatment success rates for opaque and non-opaque stones were 86.6% and 73.6%, respectively (P = .167). Flexible URS was a successful modality with acceptable morbidity to treat renal stones.
  
  
  CONCLUSIONS
  These results show that radiolucent and opaque stones can be effectively treated by flexible URS.&nbsp;
authors.forename: Serhat
authors.initials: S
authors.lastname: Tanik
authors.forename: Kursad
authors.initials: K
authors.lastname: Zengin
authors.affiliation: Bozok Universitesi Uygulama Arastirma Hastanesi, Uroloji Anabilim Dali, Yozgat, Turkey.. salbayrak77@hotmail.com.
authors.forename: Sebahattin
authors.initials: S
authors.lastname: Albayrak
authors.forename: Muhittin
authors.initials: M
authors.lastname: Atar
authors.forename: Muhammed Abdurrahim
authors.initials: MA
authors.lastname: Imamoglu
authors.forename: Hasan
authors.initials: H
authors.lastname: Bakirtas
authors.forename: Mesut
authors.initials: M
authors.lastname: Gurdal
mesh_terms: D000328:Adult; D000368:Aged; D004724:Endoscopy / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D007670:Kidney Calices; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome; D018666:Ureteroscopy / Q000379:methods; D055815:Young Adult