I came across an interesting article called Spontaneous Remission. The blogger has a mystery disease called Myosists and a rare antibody called the JO-1. Both of these conditions are incredibly rare and the medical field know hardly anything about it. What they do know is that people with this condition have a 30-50% chance of getting cancer as well and those who have had cancer treatments find that the myosists disappears.
If you're interested in reading more about this interesting condition take a look over on Remission Theory's blog site.