David, hi, could you tell us more about your Dad- How old is he? What is his attitude about all of this? How well has he handled the surgery he had? Losing so much of his tongue has already affected the quality of his life as he knew it before. The rad tx will be tough, and alot will depend on his attitude and the fortitude of the caregivers involved in his care. There are a zillion posts here about radiation and the after effects. Alot depends on the age, general health and attitude of the person undergoing it. Amy in the Ozarks