Cancer can develop in almost any organ or tissue, such as the lung, colon, breast, skin, bones, or nerve tissue.There are many causes of cancer, including:Benzene and other chemicalsDrinking excess alcoholEnvironmental toxins, such as certain poisonous mushrooms and a type of poison that can grow on peanut plants (aflatoxins)Excessive sunlight exposureGenetic problemsObesity RadiationVirusesHoweve