For radiation, 5 years is closer to shortest time for secondary cancers (and only some types) to develop. Radiation often gets blamed for the chemo effects. Working with it everyday I see more good than bad. But there are many hopeless cases that dr's elect to treat a patient ($$$$$) instead of being truthful with them and letting them be with family. Family can be difficult too, forcing them to be treated. It's just an awful and unnatural thing to go through. There are break through methods developed but insurance wont cover them so they don't go forward. That's the large problem here. Better treatments are not available because of regulation, medical insurance and special interests not wanting advancements.