Since the cancer has already left your prostate, they usually want to do radiation of the prostate, eventually, to stop it from continue to propagate the cancer.

Really need to see the pet scan results to know what is going on. It’s very possible this can be treated and you can continue to live many years. I know people with much higher PSA’s than you that have lived many years.

The lower back pain could be due to metastasis and treatment could reverse it.

Let us know what the results of your PET scan are and what the doctor says you need to do.