My dad was diagnosed in June 2019. Psa 292. Gleason 9. Stage iv. Mets to the bone. Underwent bilateral orchiectomy and TURP in July and has been on zytiga + prednisone since August.
His psa is now 94 and hasn't gone down further. No significant side effects or pain. He's diabetic.
What would be the best treatment plan, for his situation?
Thank you ‼️