Okay seriously you need some new drs. Your dad is unable to advocate for himself. With a medical POA you have every right to sit down with the drs. How heck can they even determine what's going on with him without even knowing his status with regards to the cancer? This is guess work and borders on negligence - in order to make a decision and even an adequate diagnosis - you need to know this information before making any decisions. If the cancer is small or localized then he should have rads as it can be curative.

If he's not at a CCC - he needs to be moved to one (likely an up hill battle - but a necessary one.) if he is adamant about wanting to die that's one thing, but he needs to have all the info first - because scary thoughts are part and parcel of the diagnosis and can play marvelous head games with a patient.

Push push push - you need answers. The wait was far too long. Chances are he did fall between the cracks and older people tend to revere their drs. And take their word without question. IMHO most drs are amazing and while you are with them they have your best outcome at heart but they are also human and make mistakes - forget things. No one can advocate for a patient like a family member or loved one. Hugs best of luck.