Your father's oncologists at City of Hope are correct in advising against surgery if he is otherwise feeling fine. In about 25 percent of patients who undergo palliative chemotherapy for pancreas cancer, there will be an objective response (for example, shrinkage of tumors, or slowing in the growth of tumors). The role of radiation therapy in the treatment of pancreas cancer is less clear at this time, however, with some clinical studies showing a potential benefit, while other studies do not show any benefit.
Unfortunately, pancreas cancer is a particularly aggressive cancer which is highly resistant to most types of treatment.
I hope that your father remains comfortable, and that he will respond to any treatment that he might choose to undergo.
Sincerely/ Robert A. Wascher, MD, FACS
http://doctorwascher.com