Cold-knife retrograde endopyelotomy: a long-term follow-up.

Cold-knife retrograde endopyelotomy is a simple, safe, and effective therapeutic option for primary and secondary symptomatic ureteropelvic junction obstruction (UPJO). Our long-term success rate with negligible complications demonstrates its durability and safety. Retrograde endopyelotomy should be considered a viable first-line treatment option for the management of patients with UPJOs.