Re: prostate cancer mestasis
I'm sorry to hear about your father.
The actuarial life expectancy of the average 85 year old man in the US is 5 years - this is without having PC. No one can predict it for an individual. Radiation and hormones at this point are palliative -- it will lessen the pain of bone metastases and help him feel better. Zometa or Xgeva may also prevent or slow down bone mets. Chemo, usually Taxotere (docetaxel), is usually very hard to take, and is not curative, so that is a highly personal decision.
I know you and your father are facing some tough choices right now, and wish you good luck in getting through them.