title: [Endoscopic treatment of renal diverticular stone (Single Centre Study of 45 cases)].
abstract: OBJECTIVE
  We aim to evaluate the outcome of flexible ureterorenoscopy (F-URS) with holmium laser in treating renal diverticular stone as a minimal invasive option.
  
  
  METHODS
  We reviewed retrospectively the records of 45 patients who underwent F-URS using holmium laser from 2004 to 2011 for symptomatic renal diverticular stone. The presenting symptoms were renal colic, urinary tract infection or hematuria. The F-URS used after the Shock Wave Lithotripsy (SWL) failure in 30 (66.7 %) patients. The repeated treatment by F-URS was carried out twice for four patients; in three patients, it was correlated to the size of the stone and it was because of failure to identify the diverticulum in one patient. The follow up visit range were between 4 to 6 weeks with plain radiograph (KUB) and renal ultrasound or non-contrast CT scan (NCCT).
  
  
  RESULTS
  Of our data, there were 45 patients, 22 women and 23 men (mean age of 46.3 years, range 18-72). We found 28 patients (62.2 %) who had stone free (SF), 10 patients (22.2 %) with clinically insignificant residual fragments (less than 3mm in size) and residual fragments (RF) in seven patients (15.6 %). Success rate was considered as stone free or insignificant residual fragment, which was obtained in 38 patients (84.4 %). The symptom-free was in 42 patients (93.3 %).
  
  
  CONCLUSIONS
  In our experience, F-URS using holmium laser was very effective minimally-invasive technique that could be the best option for the treatment of renal diverticular stone especially for those who resist the treatment with the SWL. It showed an excellent stone clearance rate, minimal morbidity rate and brief hospital stay.
authors.affiliation: Service d'urologie, université Pierre-et-Marie-Curie, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France. dorian.legraverend@yahoo.fr
authors.forename: D
authors.initials: D
authors.lastname: Legraverend
authors.forename: S M
authors.initials: SM
authors.lastname: Al-Qahtani
authors.forename: S
authors.initials: S
authors.lastname: Doizi
authors.forename: M
authors.initials: M
authors.lastname: Sejiny
authors.forename: M
authors.initials: M
authors.lastname: Tligui
authors.forename: O
authors.initials: O
authors.lastname: Traxer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004240:Diverticulum / Q000150:complications / Q000601:surgery*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000150:complications / Q000601:surgery*; D007674:Kidney Diseases / Q000150:complications / Q000601:surgery*; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D018666:Ureteroscopy; D055815:Young Adult