I too wonder if there is a genetic link to MG. Everything I have read says it is not. My father was recently diagnosed with MG. His mother also had it and died due to complications from it. From what I have researched, there are only about 1 in 5,000 people diagnosed with MG. For a mother & son to both have it seems a little too much of a coincidence for me. Your post is from 8 months ago, and I was wondering if you found any new information?