Endometriosis: The presence of tissue that normally grows inside the uterus (womb) in an abnormal anatomical location. Endometriosis is very common and may not produce symptoms, or it may lead to painful menstruation. It has also been associated with infertility. Endometriosis occurs most commonly within the Fallopian tubes and on the outside of the tubes and ovaries, the outer surface of the uterus and intestines, and anywhere on the surface of the pelvic cavity. It can also be found, less often, on the surface of the liver, in old surgery scars or, very rarely, in the lung or brain.

Endometriosis occurs in the reproductive years. The average age at diagnosis is 25-30.Endometriosis may be suspected by during a physical examination; it is confirmed by surgery, usually laparoscopy; available treatments include medication for pain, hormone therapy, and surgery.

Common Misspellings: andrometriosis, endometreosis, endometrisis, edometriosis, indometriosis