Dent, I don't know if it'll make you feel better but the same thing happened to my Mom 10 years ago. She was supposed to have a partial hysterectomy (leaving her ovaries) and ended up with a total because of endometriosis. 9 times outta 10 they don't know how bad the endometrial tissue damage is until they actually get in there and poke around a bit.
I'm glad your sister made it through ok though - that's the important thing!
Squeak - Good to hear your friend is taking some, albeit forced, time off. I'll continue to keep them in my thoughts.
Terri