Thread: My first AChR antibody test was Positive, 2nd one is Negative.
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Old 03-21-2014, 11:25 AM
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The second blood test was taken at a different hospital and sent to a completely different lab.

thank you for your fast Reply. :-) This forum is so informative. :-)


Quote:
Originally Posted by AnnieB3 View Post
Mark, Were both tests done at the same lab? That can make a difference.

Antibody levels fluctuate. And those levels do not reflect the severity of MG!

What if your antibodies during that second test were too busy attacking your tissues (tissue bound antibodies) and there weren't enough circulating antibodies to show up on the test?!

That's why MG is a clinical diagnosis backed up with tests! A negative doesn't prove anything.

Don't sweat it!

Annie
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