Isolated urinary bladder endometriosis

Endometriosis is the presence of ectopic endometrial tissue outside the uterine cavity. Urinary tract endometriosis is rare and occurs in only about 0.3-12% of cases with the bladder being the most commonly affected organ (85%). Bladder endometriosis is a great masquerader and usually does not present with cyclical hematuria thus often delaying the diagnosis. We present such a rare case along with a review of the literature.