How old is your father? Is he able to weigh in about what he wants to do? Do you know what his wishes might be? It sounds as if the family is caring and looking for a good decision. Since we're not medical professionals here, I can't respond on the scan and biopsy level. But on the emotional level, it seems you might be leaning towards the first option. If so, get palliative care and hospice in place so you have enough support. You might also ask a third party--like a social worker or a clergy person--to help clarify how this decision would work. But a lot should depend on what your father prefers. Does he have any written directives? I hope things go smoothly, and that you get helpful answers.