This test is similar to the CPK which is elevated in people who have muscle damage. I was wondering if anyone else has had this test done and what were the results if the level was elevated. I saw the neurologist this past week for muscle weakness, and balance problems along with memory problems. I managed to fail the tests he gave me and to top it off, found out I have a brain tumor (probably non-malignant), but the tumor isn't the cause of the problems. I'm trying to figure out if this is all a result of my having severe Fibro, or something else. Any input would be appreciated!