My mother passed away from this disease on April, 27, 2000. Because she was a borderline diabetic, she ate many foods sweetened with Aspartame, especially sugar-free yogurt. There was no cancer in her family. I had read that there may be a correlation between Aspartame and brain tumors, but was told at the time that they really did not have enough evidence to prove that. I'm sorry for your loss. I know how terrible this disease is.