Hi all, was dx in march '17 with stage 4, gleason 9 at 56 yo. Mests in feet left knee spine shoulder . I am on casodex daily and lupron shots once a month. My psa is undetectable and test. Is high 30s. Last bone scan was good, nothing new & some regresson. Question is , he says i have "nasty stuff". Im not a cancer expert,what type of cancer is nasty stuff?