In my uncle's case, it is too late. He is starting to have blood in his urine and feces and he doesn't really know where he is or what is going on around him.
Again, thanks to many of the HESG'ers for your kind words and support.
And to the JA on the board, who in personal email took pot shots at me for losing my dad this way, and now his brother, well, you know who you are, and what you are. JA!