Initially, I was treated for low volume Gleason 3 + 3 cancer in 2011 with brachytherapy. In 2016, I an extra-capsular recurrence that was treated with ADT ( 3 months Firmagon and 6 months Lupron) and cyberknife. Then in 2018, my PSA started rising rapidly with less than 2 months PSADT from <0.1 in January to 4.48 in November. A PET/CT scan showed multiple lymph node involvement and a biopsy of peri-rectal lymph node confirmed metastatic cancer.
In November 2018, I started Lupron + Casodex treatment. My PSA went down rapidly: Nov 2018: 4.48, Mar 2019: 0.17, Jun 2019: 0.1, Sep 2019: 0.07, Nov 2019: 0.06.
It appears that my PSA has bottomed out. My MO recommended a break from ADT, which I decided to accept. I will go for another PSA and other blood works at the end of February.
So far my concern was becoming castrate resistant. I understand most men become castrate resistant in 1 to 3 years on ADT. I was on ADT in 2016/17 for 9 months and this time on it for 12 months. Does this mean that I should count 21 months on ADT for the castrate resistant clock? Or the clock started at the start of ADT in October, 2016?
I have wondered about the source of my lymph node metastasis. Did it come from the extra-capsular recurrent? Or, was it in the lymph nodes in microscopic form since initial diagnosis?
Did I make a good decision to take an ADT vacation? MO left the decision entirely to me but expressed his recommendation for it.
When my PSA starts rising again, what should be the threshold for restarting Lupron or other treatments? What role PSADT and imaging play?