I think most cancers talk about 5 and 10 year survival rates. I'm not sure, but I think they do 5 year because with some cancers if there is NED after 5 years, doctors will say they believe the person to be "cured." Of course, we know melanoma does not fit nicely into that category because it can come back after many many years. So, then, why for melanoma don't they put survival rates down for 15 or 20 years? Like, an in-situ or 1a or 1b 20-year survival rate?