He's getting some relief from the life style promoted by Dr. George Jelinek in "Overcoming MS" another brain disease.
More direct is prof. Jane Plant CBE in her book "The No-Dairy Breast Cancer Prevention Program". In her case multiple surgeries, radiations, chemo's were not working and she had months to go. Changed her life style, that was 17 years ago and now she's doing fine. Importantly, she's found that men's prostate cancer is also susceptible to the same things and is also resposive to life style changes.
One of the considerations is cow's milk is intended to grow calves into steers as fast as possible. Many things in cow's milk enable fast growing cells to grow faster....such as calves or human cancer cells...
Our son after a year of poor sleep, waking up after a couple hours, etc. is now doing better granted his condition is much different than yours- but does involve the brain.
We find the standard medical practices are drugs, surgery, radiation, etc. with little knowledge of life style. Much more is in Cornell nutritional bioligist prof. T. Colin Campbell's book "The China Study". A specialty of his is liver cancer which is also very responsive to life style.
All 3 books are available from Amazon and bookstores. All three of these authors are scientists so they do get into detail of studies and evidence and how and why as well as what to do.