The definition of cancer means that cancer cells don't die as they are programmed, they lack apoptosis. The reasons for this range from genetic defects to overgrowth of chromosomes. Cancer is believed to be caused by genetic and epigenetic factors that include poor lifestyle, radiation exposure, infections, pollution, and more. The spread of cancer is complicated; it is not haphazard.
Combining mainsteam and alternative strategies provides the best outcomes, but is rarely available. Early detection is discussed. Diet, exercise, sleep, stress, and weight have a powerful effect on whether or not you'll get cancer.