[Anterograde transpelvic endopyelotomy].

The Authors describe their own technique of antegrade endopyelotomy for cases of primary ureteropelvic junction obstruction. After percutaneous access has been gained via the lower calix, the technique involves making a wide opening of the renal pelvis and exploring the peripelvic space in front of a 3 to 4 cm long section of the ureter. The aim is to carry out the operation with an unrestricted view and without the need for a large calibre stent, in order to perform endopyelotomy in pediatric patients or in the presence of anomalous vessels. The follow-up demonstrates good results in 80% of 46 patients aged 5 to 62 years. The Authors think that antegrade transpelvic endopyelotomy is an endourologic operation with results and feasibility similar to those reported for open surgery.