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What ' s known on the subject? and What does the study add? New techniques and instrumentation in laparoscopy including the use of ' single-port ' devices and natural orifi ce transluminal endoscopic surgery have been proposed to reduce the invasiveness of these procedures. The introduction of small laparoscopic instruments ( < 3 mm) continues to further the fi eld. To date, mini-laparoscopic instruments have been used in many urological procedures, e.g. pyeloplasty in the paediatric population. However, data of pure mini-laparoscopic pyeloplasty (mLP) for the treatment of pelvi-ureteric junction obstruction in the adult population are lacking.In a selected adult population mLP is feasible and safe. Perioperative and 1-year functional results are comparable with those of standard LP, while cosmetic results of mLP are more appreciated by the patients.

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Up to the present laparoscopic surgery is the best approach for GN treatment.