title: Excision of the dilated pelvis is not necessary in laparoscopic dismembered pyeloplasty.
abstract: OBJECTIVE
  The surgical treatment of choice for significant hydronephrosis is dismembered pyeloplasty. While in open surgery, extensive resection of the dilated pelvis is common practice, laparoscopically usually only a sparing resection is performed. We compared the treatment results of both techniques to investigate whether extensive resection is necessary or not in dismembered pyeloplasty procedures.
  
  
  METHODS
  To obtain comparable renal units, matched pairs according to age and relative kidney uptake as shown by (123)J-orthoiodohippurate renography were selected out of a total of 76 patients who underwent dismembered pyeloplasty between 2000 and 2007. Twenty-four patients complied with the criteria for inclusion in the study. Changes in urinary drainage preoperatively and at three months postoperatively were compared between both groups.
  
  
  RESULTS
  The mean age in the sparing resection group was 3.8 years (range 0.3 to 14 years); in the extensive resection group it was 3.4 years (range 0.5 to 10 years). Mean urinary drainage improved significantly in both groups from 35.1 +/- 10.7 % to 75.2 +/- 13.2 % (sparing resection) vs. 45.1 +/- 23.7 % to 70.2 +/- 22 % (extensive resection). There were no differences between the groups (p > 0.05).
  
  
  CONCLUSIONS
  We conclude that extensive resection of the renal pelvis is not necessary in dismembered pyeloplasty procedures since there were no differences in the renographic outcome of comparable patients treated by the different surgical methods.
authors.affiliation: Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany. reismann.marc@mh-hannover.de
authors.forename: M
authors.initials: M
authors.lastname: Reismann
authors.forename: K F
authors.initials: KF
authors.lastname: Gratz
authors.forename: M
authors.initials: M
authors.lastname: Metzelder
authors.forename: B
authors.initials: B
authors.lastname: Ure
authors.forename: S
authors.initials: S
authors.lastname: Glüer
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis / Q000601:surgery* / Q000652:urine; D007223:Infant; D007457:Iodine Radioisotopes; D007465:Iodohippuric Acid; D007682:Kidney Pelvis / Q000601:surgery*; D010535:Laparoscopy / Q000379:methods*; D008297:Male; D011866:Radioisotope Renography; D016896:Treatment Outcome; D013520:Urologic Surgical Procedures / Q000379:methods*
chemical_list: D007457:Iodine Radioisotopes; D007465:Iodohippuric Acid