This document discusses cancer, including what it is, how it is treated, statistics, risk factors, and preventative measures. Cancer forms when cells grow uncontrollably and can spread through the body. It is treated through surgery, chemotherapy, or radiation. Statistics show cancer is most common in the elderly, with over half of new cases being prostate, breast, lung or colorectal cancers. Risk factors include age, alcohol, tobacco, obesity, and exposure to carcinogenic substances. Preventative measures consist of not using tobacco, eating healthy, staying active, and visiting doctors regularly for cancer screenings.