Válvulas ureterales en el ni？o: Tratamiento mínimamente invasivo mediante laser holmium

objectives: to present the minimally invasive management of an annular ureteric valve causing upper urinary tract obstruction. methods: a case report description: endourological technique and medium-term results with review of the published reports. results: a 12 year old patient with right flank pain was attended. ultrasound showed right ureterohydronephrosis with conserved parenchyma. uro-mri (axial plane) showed dilation down to the middle of the right ureter with a filling defect, without extrinsic compression. ureterorenoscopy showed a ureteral valve that was resected by holmium laser. ureteral stent was maintained for 3 weeks. twelve months after treatment patient has no symptoms and the following ultrasounds did not reveal right ureterohydronephrosis. conclusions: obstructive ureteral valve resection by endourological treatment using a dornier holmium laser is a safe and effective minimally invasive method according to short and medium term results.