Mr. Bill, speaking for myself, I don't have any experience with STN from MS. I do recall reading a study which was posted on the TNA's website(I think) regarding success rates for balloon compression surgery. Here is a link to a page with a lot of study's which reference it and other types of interventions http://www.fpa-support.org/?s=balloon+compression If you haven't visited this site, its an excellent resource for good information regarding all things TN. There is also a study on there for TN and MS, so if you haven't already read it, its probably an informative read. Also, the book titled "Striking Back" is another excellent resource. Its available on their website and may be available through your local library as well. I haven't had any surgical interventions so I can't speak to them with any personal knowledge. Given that its the weekend, some of the others maybe too busy to stop in and post. Hopefully they'll share their knowledge and experience where they can. Hang in there.