Ureteral endometriosis with impairment of unilateral renal function at the time of initial examination: A report of three cases

Introduction: The prognosis of ureteral endometriosis is good if proper treatment is applied, but lack of subjective symptoms often lead to poor treatment. The disease comprises as low as 0.1％ of all pelvic endometriosis and 10％ of urinary tract endometriosis. Therefore, both patients and doctors are usually unaware of the seriousness of the disease, and in some cases, patients do not seek medical attention although problems are noted during examinations. Even when medical attention is sought, treatment is delayed because of the lack of a proper diagnosis. In this report, we describe three cases in which unilateral renal function was impaired due to ureteral endometriosis.