Hi. I'm so sorry you're going through this. For me, not being diagnosed was a terrible emotional strain.

If your blood test comes back negative, don't rule out myasthenia gravis. There are a lot of us here with negative blood tests. It's pretty common. I've seen different numbers for "seronegative MG," up to 20%, but I believe the real number is higher. Some people who test negative for the most common antibody test positive for one of the others. And some people never test positive at all (like me).

If your blood test comes back positive, that's a diagnosis. But if it comes back negative, you need more tests. One of the tests is called a "single fiber EMG" (SFEMG), and it's more accurate than the blood test, but not all neurologists can do this test.

Please keep in touch here, and I hope you get some clear answers soon!

Abby