Cancer is an uncontrolled growth and spread of detrimental cells. It can affect almost any part of the body. The growth often invades surrounding tissue and can metastasize to distant sites. Many cancers can be prevented by avoiding exposure to common risk factors, such as consumption of tobacco through smoking. In addition, a significant proportion of cancers are curable by surgery, radiotherapy or chemotherapy, especially if they are detected early.
World Cancer Day, organised by the Union for International Cancer Control, is an opportunity to highlight the wide range of actions needed to effectively prevent, treat and control the many forms of cancer. Observed each year on the 4th February, this day is publicly known as the World Cancer Day, when organisations and individuals around the world unite to raise awareness about cancer and work to make it as a global health priority. The day was first organised by the International Union against Cancer in 2005.