His Gleason score was NOT 2+4=6 (The numbers must be 3,4 or 5), and he would not have PSA that high with only a GS 6. Castration resistance means rising PSA while he was on Zoladex. If his PSA increased when he was only taking bicalutamide (Casodex), he is not castration resistant.
Pathologists do not report gleason pattern 2 since 2005. What country is he in? if the rest of the tumor was pattern 4, he would be classified as GS 4+4. I sent you my email.
A cancer with bone mets and a PSA of 228 is no Gleason 6. Maybe someone made an error and this should read 5+4.
Zoladex is a more effective drug than Casodex, so it is no surprise that the PSA value went down again after using Zoladex again.
It is also no surprise that it did rise after Zoladex was stopped. Zoladex will continue to work for several months after the last injection so the PSA value rises slowly at first.
Your father is resitant when the PSA value rises while on Zoladex.
A TURP cannot cause a PSA that high. This was probably caused by the bone mets.
"Zoladex reduce PSA 11.4 to 9.5 within 4weeks is it good sign ? "
As I wrote, the rise in the PSA value was caused by stopping Zoladex in February. Now it goes down again since Zoladex was started. This means your father is not resistant.
"What happened in castration resistance stage ?"
You have to take expensive drugs, called Zytiga or Xtandi.
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