I was stage PC stage 4 with a Gleeson score of 9-10 when diagnosed 2 years ago. I went to Mayo-Rochester and underwent ADT (Lupron) and chemo (6 rounds of Docetaxel) followed by 20 fractions of radiation. I have been clear for a year now. During my treatment, I met a gentleman with a PSA of 3400 (yes) who went through my same therapy, had a hip replaced, was stage 4 and had a second round of chemo with Lutetium. Although only a third of patients respond well to that treatment, he did and is now clear.
It’s not a fun journey but you’re not on it alone. Thoughts and prayers are with you and your father.