[Internal urinary derivation using an antegrade approach: indications, technic and results].

We report our experience in a group of patients with different pathological conditions and ureteral obstruction in whom placement of a double J stent had been attempted. Insertion of the stent beyond the site of obstruction by the retrograde technique could not be achieved and we therefore used the fluoroscopy-guided percutaneous approach. The indications, techniques and results are discussed.