Farrah Fawcett had and sought treatment for anal cancer (which BTW if anyone can explain the difference between this and colon cancer, please do...).

And w/ regard to diabetes, it IS life threatening. I have a cousin, age 50+ who was in a coma & nearly died from juvenile diabetes at age 2. As one of its most famous victims, Mary Tyler Moore once claimed, the fact that it is controllable with daily insulin shots does cause many to forget how serious it can be.

Apple