Hi my name is Chris and I am new to this forum. I am so sorry to hear your story. You must feel frustrated and afraid that all of the tests have not revealed the diagnosis. When I recently had a CT scan to check out my neck pain they found that I have had a small cerebellar stroke. I don't know when this occurred so I am afraid of another stroke. I have other neuro symptoms but so far no diagnosis. I can understand how frustrating it is when the docs cannot make a diagnosis. I wish you well and hope they can help your loved one find a diagnosis.