Deep Infiltrating Endometriosis-Urinary Tract Involvement and Predictive Factors for Major Surgery.

OBJECTIVE: To evaluate urinary tract involvement by deep infiltrating endometriosis as well as the surgical treatment and existence of predictive factors for major urologic surgery.

METHODS: We conducted a retrospective analysis of 656 women submitted to surgery for endometriosis, of which 28 patients underwent minor or major surgery for deep infiltrating endometriosis involving the urinary tract, with a mean age of 38 ± 6.9 years (27-50) at diagnosis. Clinical data, surgeries performed, and complications were analyzed. Minor surgery was defined by endoscopic surgery or insertion of a percutaneous nephrostomy catheter, and major surgery included open or laparoscopic procedures.

RESULTS: Endometriomas affected the ureter in 13 (46.4%), the bladder in 11 (39.3%), and both structures in 4 (14.3%) patients. Twelve (42.9%) patients had decreased renal function, and ureteral involvement was predictive of renal function loss (P = .034). Minor surgeries were performed in most women with isolated bladder involvement and in 12 (42.9%) patients with ureteral infiltration. Patients with ureteric involvement underwent major surgeries more often (n = 12 vs n = 3; P = .025) and had longer hospitalization (8.2 vs 3.1 days, P = .05). After a mean follow-up of 36.3 (1-102) months, there was no bladder involvement recurrence. The most common complication was ureteral stenosis (Clavien-Dindo grade IIIb) in 3 (10.7%) patients.

CONCLUSION: Surgery is highly successful in most cases. Patients with ureteric involvement are more likely to lose kidney function, undergo major surgery, and have longer hospitalization.