Cancer Care Cancer Survivorship According to the National Cancer Institute, there are more than 11 million cancer survivors in the United States today.The term "survivor" can be defined in different ways: Having no disease after diagnosis or the completion of treatment. The process of living with, through, and beyond cancer. By this definition, cancer survivorship begins at diagnosis. As a cancer survivor, it's important that you keep certain information about your disease and treatment, because it may be helpful to other healthcare providers years later. The American Society of Clinical Oncology (ASCO) has online tools to help you fill out a survivorship plan that details your treatment summary. These forms are meant to give basic information about your cancer treatment and follow-up care to future healthcare providers.