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Which Factors Increase the Risk of Cancer?

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The single most important risk factor for the development of cancer is tobacco exposure.

Research has shown that tobacco contains thousands of different chemicals, and more than 40 of these chemicals have been documented to be possible carcinogens.

Although cigarette smoking is the major cause of lung cancer (the single most deadly cancer in both men and women) and cancers in the head and neck regions, it’s also a major risk factor for the development of cancers of the esophagus, stomach, pancreas, colon, liver, kidney, bladder, and cervix.

In addition, exposure to secondhand smoke, resulting from regular close contact with a smoker, has been estimated to result in more than 3,000 cancer deaths in the United States each year.

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