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Ureterocele is a cystic dilatation of the intravesical submucosal ureter, with an obstructed orifice. Endoscopic treatment is one of the most common option for surgical treatment. In intravesical ureterocele, the punctures must be made just above the junction between the ureterocele and the bladder floor. We commonly use a 8–9.8 Fr cystoscope, with a 5 Fr working channel, a metallic needle for bulking agent injection 3.7 Fr. In selected cases we also use electric or laser probes to decompress the ureterocele. When evidence of decompression is verified and vesicoureteral reflux is excluded, antibiotic prophylaxis is stopped. If, despite decompression, a large ureterocele is subsequently obstructing the bladder neck a surgical excision is necessary. Forty-four patients (92%) were treated endoscopically. Ureterocele puncture was performed with a metallic needle for bulking agent injection in 30 cases (63%), with a laser fiber in 7 cases (15%), with an electrified ureteral catheter in 4 cases (8%), and with Bugbee in 3 cases (6%). A success rate after one procedure was achieved in 40 children (83%). Adequate opening of the ureterocele with complete decompression of the reno-ureteral system is the goal of endoscopic treatment. An overaggressive incision or puncture could result in an increased chance of secondary vesicoureteral reflux. [ABSTRACT FROM AUTHOR]