23 months: I called for the test results. The high resolution genetic testing was all negative.

Guess that is good news and bad news. Relief but worry.

Neurologist told us last time that if this came back negative, the last test is a muscle biopsy. I barely made it through the blood tests. However, he said it can uncover some conditions that are correctable, so it is probably worth doing.

Info about muscle biopsy: http://www.nlm.nih.gov/medlineplus/ency/article/003924.htm