Endometriosis is abnormal growth of endometrial tissue outside of the uterus. The inner lining of the uterus is called the endometrium and is composed of endometrial tissue. When this tissue is found outside of the uterus, it is called endometriosis. Endometriosis is most commonly found on other organs of the pelvis.
Interstitial cystitis (IC) is a condition that results in recurring discomfort or pain in the bladder and the surrounding pelvic region. Because the most prevalent symptom of IC is bladder pain, it is often referred to as painful bladder syndrome (PBS).