I too, am very sorry to hear of this recent news for you, and I too, have recently become recurrent. However, like you, I was also "high-risk" (Gleason 9), and in retrospect, I think in many ways, despite being well-informed of things when I was first diagnosed and treated, I was not fully grasping the hidden reality, that I was probably never going to be fully "cured" of the disease.

I lacked any genetic or familial history (i.e., I was deemed free of any BRCA1/BRCA2 gene involvement), and to be clear, your own case may prove to be entirely different from mine in the end (it's important to trust in that), but the fact remains that the cancer (at least for me), was (and still is), an "aggressive" one. There is simply no way to mitigate or attenuate a Gleason 9 or 10. Yes, with considerable help, I hammered it hard enough initially, to gain almost eight (8) carefree years (Yah-hoo!), but with no true "cure" for it, I really should have known from the outset, that one day, I'd be facing it yet again, and again, and again.

Anyway, the very best of luck to you going forward and please keep us all posted.