Off the original topic, but I read something in the last week for MS treatment that seems to cure it completely. This is done by taking the patient's own bone marrow, and transplanting it back after killing off the existing bone marrow.

Somehow, this has shown to be a cure, but the doctors that came up with it don't yet know why - the treatment is ahead of the knowledge in this case.

Edit: Here's the story I read: http://www.ottawacitizen.com/health/Ottawa+doctors+behind+br...