My husband went through 39 radiation treatments for stage 4 tongue cancer. From the onset of the cancer through treatment, which was almost a year, he lost 80 pounds. He was over weight prior to the cancer and was quite thin by the end of treatment but he was not weak and never had a feeding tube. He drank shakes blended with bananas, ensure, and ice cream, as many as he could in a day. I also juiced for him every morning, a variety of fruits and vegetables which he feels helped limit the mouth sores. He only had a temporary feeding tube in his nose for 2 weeks after surgery.