@tbyota
Did you mean you are scheduled to take PET scan next week versus not?

If not would suggest you asked for a PSMA test. Also the Decipher test. Both will help more define you husband's diagnosis and risk level of his cancer.

I had MRI/contrast, MRI/Fusion biopsies, PSMA, bone scan, and Decipher. I also did 3 different opinions on diagnosis and treatment options so passing you to you my experience with those.

My test did not show cancer was outside of prostate. So I don't have any direct experience with the options and treatments when and if goes outside of prostate. I think important to just share you personal experience with your journey of diagnosis, treatments, and outcomes and on going life.

Many on MCC did have their cancer outside thier prostate at time of diagnosis and many found out later that it had spread outside prostate years later and what treatments and options they had. I think that personal experience is far more relevant to you than citing studies.
Good luck and hope it is diagnosed only inside prostate. Know though in today's world urologist and R/Os and surgeons have great treatment options.