Hi... You are in a difficult position. Firstly at this point I can tell you that they don't seem to be treating to cure from what I can tell since generally chemo is not curative with this type of cancer. Unless it is a clinical trial that they have your father on. In light of this, the commitment to stick with a standard program may not be their top priority. I would sit down and ask this is the only way you will know. If the cancer hasnt spread into the lungs then I would be pushing them to do whatever they can. Perhaps more radiation? or surgery if possible. If it is in the lungs I would look for clinical trials if any are available and his health allows. Hugs and blessings to you.