Hi,
My father had a prostatectomy in 2017 but his prostate cancer has since come back. He started treatment in August last year and is currently being treated with a hormone injection every 3 months and daily enzalutamide tablets. The treatment initially worked perfectly and dad's PSA score dropped to undetectable, however since March it's stared to creep back up. 0.3 in March but 0.7 in May. I understand that it's still very low, but I'm really worried this is the start of this treatment already starting to fail, is this PSA pattern common for this treatment type?