Here's an interesting study on the effect of EGCG found in green tea and Resveratrol found in red grape skins and their positive effect on reducing endometriotic lesions in mice. humrep.oxfordjournals.org/c...
Not a 'cure' but perhaps these things can be added to your diet to help matters. Both can be purchased in supplement form but it is not known whether an isolated compound works on its own without all the other compounds found in that food.
I haven't bottomed out how much of each would be required to produce a positive effect but I should think quite a few cups of green tea each day would be necessary. I do drink some green tea with a small bit of honey and I take a supplement that includes resveratrol. Apparently studies have shown that Matcha green tea has 137 times as much EGCG as normal green tea so even though good quality Matcha is quite expensive it would seem to be a better option. I also eat red grapes when I can. Grapes are heavily sprayed with pesticides etc. so I don't bother if they are not organic.
You will see that the study also points out that these two compounds are powerfully anti-cancer.