Sorry you have to have surgery. While I haven't had that particular surgery, I have had 4 long surgeries in the last couple of years due to cancer. Five hours, 2 hours, 2.5 hours and 2 hours. The first two were done while MG was not at all stable and I did fine. The resting after the surgeries kept the MG from going nuts. The last 2 were done after I was stable on Rituxan, and I recovered very quickly.

It's best to have the MG under as much control as you can before heading to surgery. I've found all the anesthesia docs to be well aware of MG and how to handle it and have never had any issues. I hope you have a very successful surgery and recovery with no mischief out of the MG!