Search for: [Abstract = "Background Intrinsic pathology of the ureter as well as various extrinsic factors can impair emptying of the collecting system. Uretero\-pelvic junction obstruction \(UPJO\) can lead to deterioration of the renal function. Mild hydronephrosis in the majority of neonates tends to disappear during the first year of life. Progressive dilation and\/or symptomatic hydronephrosis require surgical treatment. A number of methods has been described to relive the UPJO. It has been shown that videosurgical techniques are safe regardless the age of the patient and surgical treatment is effective in 90\-96% of cases. Furthermore, the short\-term complications appear in 10\-14% of patients. In many centers laparoscopic pyeloplasty \(LP\) has become the treatment of choice. A lot of clinical trials has been committed to identify risk factor of failure. However, no relationship has been found between the approach \(trans\- vs retroperitoneal\), the way of completing anastomosis \(running vs interrupted\), the suture material \(poly\- vs monofilament\) and the postoperative course. Neither the manner of stenting \(internal vs external\) nor the duration of temporary diversion influence the outcome. The goal of this thesis was to identify the risk factors for complications after laparoscopic pyeloplasty, in particular\: \- to find out whether children with lower urinary tract \(LUT\) anomalies are at greater risk f"]

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