Radiation treatment dosage is usually around 70Gy, but there is usually more they can do the 2nd time, in my case a 3rd time using different types of treatments, and radiation techniques with dosage and volume, and by protecting the vital structures like brachial plexus nerve, and others that have lower toxicity levels, and use flaps for protection, and sometimes to do more radiation. As you probably know, chemo is not a cure, only radiation and surgery is. If the doc said, no, which happened to me twice, I looked elsewhere, and found an excellent doctor that did a type procedure I was looking for, for a cure. Good luck.