I just received an MRI report last night that says I have the same thing. I found your post when I did a search for cervicomedullary flattening to see exactly what that meant.

I highly recommend chiropractic and massage. Follow what ever the chiropractor recommends for treatment & find a good massage theraphist to see twice a month. They have both helped me tremendously over the years. Part of my neck and back injury is from 1975 but 6 months ago I was rear end by a vehicle going 50 mph while stopped at a stop light. Since then I've been in horrible pain with numbness in legs, arms and hands and muscle spasms in my back.