It looks like his PSA doubling time is about 1 month so in three months his PSA will be about 4.
They will need to increase his treatment, maybe more chemotherapy or stronger ADT, such as enzalutamide or arbiterone . The stronger the treatment the more likely he is to have side effects, the sooner they start the treatment the sooner the cancer will learn to find away around it.
I can see a strong argument for delaying increasing treatment.
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