Doctors cannot pinpoint my problem

[qdude]

Background  - 57 yr old male - perfect health until two years ago. I started noticing limp. Limp got more pronunced. Gradually had some weakness in right shoulder/arm and right leg. Constant burning in right shoulder and more weakness.
Test conducted - EMGs (3), Brain MRI (2), Spine/Lower Lumbar MRI, Autoimmmune blood test, Spinal Tap - all normal - there were some white spots on Brain MRI but were found to be normal for my age.
My Neurologist put me on low dose Sinemet for 6 weeks. This is usually intended for Parkinsons patients.
Help, I have an uneven gait with some balance issues. The constant burning in my shoulder is frustrating.

[qdude]

Thanks for your suggestion. I'll see what my Neurologist says about it. I'm ready to try almost anything at this point.

[caregiver222]

Rule out a human endogenous retrovirus infection, specifically HERV-W, which causes neuroinflamation. A quick way to begin a differential diagnosis is to suggest your physician administer oral prednisone, 50 mg for five days, and see if the symptoms completely disappear.