I have just read the latest research article first published in the journal human reproduction.It refers to a link with endometriosis to other diseases such as Rheumatoid arthritis, lupus, chronic fatigue syndrome, fibromyalgia, and allergies. The research suggest immune abnormalities may underlie these conditions. There is a strong suggestion that the malfunctioning of certain immune sytem chemicals called cytokines may be a common link. Cytokines are non antibody proteins secreted by inflammatory leukocytes (cells that help the body to fight infections and other diseases), also refered to as white blood cells that act as intercellular mediators. They differ from classic hormones in that they are produced by a number of tissue or cell types rather than by specialised glands. They generally act locally in a paracine or autocine rather than endocrine manner. There appears to be limited info on this link at the moment, but researchers say that if they can find the common link or links between these diseases they may well be close to finding a cure for these conditions.