Really good news, and I'm happy for you your family and your dad, but it's a wrong diagnosis, not a miracle.

I do believe miracles happen (the fact that we're all alive is the biggest miracle of all) but this is science at its worst.

My ex's dad had...lungcancer.  He also had two heart valves that leaked, so they couldn't do anything about his heart because of his lungs and nothing to his lungs because of his heart.
The specialist gave him nine months at the most.
We decided not to tell him as he was already 78 and brooding.

He died this year, aged 91. Of kidney failure.

Had they told him he had only nine months left, he would have died nine months later.
That's not a miracle either, it's avoiding a self-fulfilling prophecy. We laugh at the "primitive man" who dies because the local sorcerer pointed a chicken bone at him. But when our local sorcerer does his "parlay", we immediately believe him.

Makes me think of StarWars. When Luke says "I can't believe that." , Yoda replies: "That's why you fail."

Sorry for the musings. The moon is full...

Wishing you and yours a quick recovery from the shock, and have a super Christmas and many years together in peace, love and harmony.

There are no Borg. All resistance is fertile.