Hi. I have not been diagnosed with MG, but sure have some kind of issues with Ach, it seems. I quit sweating, my diaphragm is weak, according to my pulmonologist, and some other things.

The question I have is, I have for about a year, not been able to sleep on my back. If I do, it slowly feels like I can't breathe. I can sleep on either side. I have had a slightly protruding right chest bone(in the front, down the middle) since i was a kid(now 50), but I now seem to have a "hump" in those bones from both sides in the upper middle of my chest.

With your thymoma, did you have trouble lying on your back? I even have problems sitting up straight in a chair--I tell the doctors that it feels like pressure in my chest. i have to sit in a somewhat reclining manner, but definitely not down on my back.