In diagnosing cancer, the main question that can be asked is about their lifespan: "How long will I live?" Or "What is the chance of success of any treatment option?" Many physicians provide patients with cancer survival data only based on the location of the tumor and its stage. Common information includes a 5-year survival rate and survival time.For instance, a physician can tell a patient with early-stage lung cancer that his or her chance of survival is 50%, which means that half of the community with this type of cancer had lived for more than five years.