@jeffmarc thanks for responding. My husband diagnosed 10 years ago stage 4 Gleason score 9 metastatic. Proton focal radiation twice. Recurrence after 2 years post discontinuing Lupron. PET scans every 6 mos. They were every 3 mos., but PSA undetectable and insurance won’t cover every 3. Bone scan only every two years. Journey has been rough. Hope the best for you.