I just finished reading "Breaking the Vicious Cycle: Intestinal Health Through Diet" by Elaine Gottschall. She tells the amazing story of how she healed her daughter from severe ulcerative colitis (that didn't respond to steroids or medication) through diet. Right before they were to have her colon removed, they met a doctor who put her on a specific carbohydrate diet (SCD). Within two years she was completely healed and symptom free (although they saw immediate progress). She was able to go back to eating normally and has remained healthy since.
The most interesting part of the book was the chapter on the brain-gut connection. Many patients that are put on this diet find that their psychiatric/neurological symptoms (schizophrenia, epilepsy, hyperactivity, autism, seizures, etc.) are resolved even before their intestinal symptoms improve. Which made sense to me because my husband met a lady at our health food store that claimed to have completely cured her epilepsy by going gluten-free.
Here is an interesting case report that my aunt sent me.