Transurethral thulium laser incision of ectopic ureterocele with duplex renal collecting system: A 10-year follow-up case report.

We report a 50-year-old female with bilateral duplex renal collecting systems and an ectopic ureterocele causing recurrent urinary tract infections and urgent incontinence. Transurethral incision using a thulium laser was performed. At 10-year follow-up, upper renal cortex thickness increased from 0.52 cm to 1.14 cm, hydronephrosis resolved, and symptoms did not recur. No secondary procedures were required. Thulium laser incision is a safe, durable nephron-sparing option for adult ectopic ureteroceles.