Cancer is a leading cause of death worldwide, with more than 10 million people dying each year from this disease. But many cancers can be cured if detected early and treated effectively. In fact, the overall cancer survival rate has improved significantly since 1991 with the hard work of physicians and researchers, improved testing and screening technology, and lifestyle changes by those who are at greatest risk from the disease. Despite these positive trends, many people view cancer as a scary disease and have many misconceptions about the causes, treatments, and outcomes for those with cancer. Understanding Cancer provides a fact-based examination of the various types and causes of cancer, treatment options (including emerging approaches such as gene therapy), methods of reducing the risk of being diagnosed with cancer, and how to care for loved ones with cancer. Stories of those who are battling cancer, as well as their caregivers, are also featured in order to humanize this disease.