Cancer refers to a collection of diseases in which abnormal cells grow uncontrollably and have the ability to invade or spread to other parts of the body. If this uncontrolled growth is not managed or treated, it may lead to fatal outcomes. Cancer can originate in nearly any organ or tissue and can occur in individuals of all age groups, although some forms appear more frequently at certain ages. Among the most commonly diagnosed cancers are breast, lung, prostate, and colorectal cancer. Several factors may increase the risk of developing cancer, including inherited genetic traits, lifestyle habits such as tobacco use and heavy drinking, contact with dangerous chemicals or radiation, particular viral or bacterial infections, and various environmental influences.