Hi, I just found this thread. I have severe endo + adenomyosis. Apparently lots of endo women also have adeno but they don't know it, since it's hard to diagnose without a hysterectomy. As far as I understand, it is basically endo of the uterus walls. It causes the same sort of pain as endo. Apparently it doesn't effect your fertility. I have found it a lot harder to get info on adeno than endo. It's also a lot harder to treat, as it can't be surgically removed (without a hysterectomy of course). All the best.