HIFU although not as damaging to the prostate as Radiation if salvage surgery is needed, it is still more difficult. I would certainly consult concerning the HIFU. Also as indicated in Mozir’s post above new surgical techniques can preserve your continence and sexual function. My biggest concern having had previous cancer, non Hodgkin’s lymphoma and experiencing chemo and two years later relapse and then some heart issues, one’s overall health can change on a dime, so you are in a sweet spot for surgery so don’t necessarily rule it out but do seek your other consultations for your informed decision