In a paper published earlier this year Elkins et al. write [1]:

"This case study reports on a 51-year-old male Parkinson's patient who received 3 weekly sessions of a hypnosis intervention, as well as instruction in self-hypnosis. Actigraphy was used to assess rest-tremor severity. Results revealed a 94% reduction in rest tremors following treatment. Self-reported levels of anxiety, depression, sleep quality, pain, stiffness, libido, and quality of life also showed improvements. The patient reported a high level of satisfaction with treatment. These findings suggest clinical hypnosis is potentially feasible and beneficial treatment for some Parkinson's symptoms. Further investigation with diverse samples and an ambulatory monitoring device is warranted."

Unfortunately, the rest of the paper is behind a pay wall, so we're left with many questions, e.g.:
- how many people did they see before he presented?
- did other people have other responses?
- what happened to his motor scores?
- why hasn't it made more news?

Reference:

[1] Int J Clin Exp Hypn. 2013 Apr;61(2):172-82. doi: 10.1080/00207144.2013.753829.
"Feasibility of clinical hypnosis for the treatment of Parkinson's disease: a case study."
Elkins G, Sliwinski J, Bowers J, Encarnacion E.
http://www.ncbi.nlm.nih.gov/pubmed/23427841

John