[Bilateral primary ureteral endometriosis]

Exposition of a new case of primary bilateral ureteral endometriosis, a very infrequent condition where early diagnosis before treatment is difficult since no other endometrial foci are found at either the uterus or ovary level or any sites. This condition has an enormous clinical significance because in a very short interval and in a silent manner can cause complete and irreversible damage to the upper urinary tract. The article explains the clinical characteristics of the disease, and discusses the diagnostic procedures available which are generally insufficient. The importance of the histological study is emphasized, and the surgical technique and its complications are described. Also, a literature review is included.