I have read where endometriosis can spread to your brain, is this true?
Endometriosis is a condition in which there are ectopic endometrial glands outside of the uterine cavity. This condition is easily confusable with endometritis which is inflammation of the lining of the uterus.
Endometrial tissue can can spread to other anatomic locations and virtually any organ can be affected. Usually, this occurs in the abdominopelvic cavity but there have been cases where the endometrial glands have traveled through the cardiovascular system and localized in different tissues, including brain tissue. The endometrial cells have also been known to travel through the lymphatic system and localize in distant tissues.
The endometrium, which lines the uterus, can grow in other places. These places are usually close to the uterus, such as the fallopian tubes and ovaries. If this tissue is anywhere other than in the uterus, it can cause blood to become trapped. This trapped blood can cause problems such as cysts and scar tissue.
I have attached an article below that explains the different theories relating to endometrial tissue being found in the brain. One theory claims that this tissue enters the bloodstream or lymphatic system and ends up in the brain. Other theories assert that embryonic cells were misplaced.