Hi manda
My dad too was told his cancer is aggressive. His Gleason score is 9 and all 13 sections of his biopsy were cancerous. He was started on hormones straight away and has already had a drop in his psa, so that's a good sign. The hormones should stop the cancer growing. It needs testosterone to grow but the hormones stop his body producing this. I think most men respond well to the hormones so fingers crossed for your dad.
I hope it's good news for your dad tomorrow xx