Do you have time for a little light reading?

http://neuromuscular.wustl.edu/synmg.html

There's CMS, which is genetic, not autoimmune. It tends to run in families, particularly the dominant gene ones.

There's LEMS which is autoimmune.

There's MG which is autoimmune.

They're all technically "channelopathies."

There are cases of autoimmune MG that run in families.

They haven't even begun to find all of the antibodies that involve acetylcholine. And channelopathies are probably more common than is known, too.

Annie