To evaluate surgical outcome and long-term follow-up of conservative laparoscopic management of urinary tract endometriosis (UTE). Prospective study. Tertiary-care university hospital. Women with laparoscopic diagnosis and histologic confirmation of urinary bladder or ureteral endometriosis who agreed to undergo long-term follow-up after laparoscopic management. (1) Laparoscopic partial cystectomy for bladder endometriosis. (2) Uretric endometriosis laparoscopically managed by: uretrolysis only; segmental ureterectomy and terminoterminal anastomosis; or segmental ureterectomy and uretrocystoneostomy. Variables assessed were: preoperative findings, operative details (type and site of UTE, type of intervention, perioperative complications), and long-term follow-up (persistence/recurrence of preoperative urinary symptoms, if present, and anatomic relapse of the disease). Mean operating time was 152.8+/-41.7 minutes. Mean drop in hemoglobin was 1.9+/-1.6 g/dL. Average hospital stay was 6 days. After surgery, 11 women had fever>38 degrees C and four presented transient urinary retention. During a follow-up period of 36 months, endometriosis recurred in eight patients with no evidence of bladder or ureteral reinvolvement, and there was a significant reduction in the mean score of dysuria and suprapubic pain maintained during the whole follow-up period. Results of long-term follow-up demonstrate significant reduction in preoperative symptoms with no anatomic relapse.