On 8/28/19 I had my 3rd and last HT "Eligard" 6 month shot.
....At the begging of this big "C" ordeal, I was told Radiation and 2 years of HT, My URO just told me last shot, Can my RO over ride the URO stopping at 18 Months..
Absolutely, and you can override both of them. The studies I've read suggest there is little to be gained by more than 18 months of HT. Your case, with G9 might be unique, but if it were me, I'd do some in-depth research, and ask probing questions. Good luck!