Smoking responsible for lung cancer

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BRENT: Cigarette smoking is responsible for at least 345,962 cancer deaths in the U.S. each year, according to a new study.
About 45% of those deaths are the result of cancers of the lung, bronchus and trachea, researchers reported Monday in the journal JAMA Internal Medicine. An additional 15% of the deaths are due to colorectal cancer, 11% are due to pancreatic cancers and 6% are due to liver cancers.
Scientists have determined that 12 types of cancer can be caused by smoking. When these 12 cancers are pooled together, nearly half of all deaths – 48.5% – can be blamed on cigarette smoking, the researchers calculated.
Lung cancer has the strongest link to smoking. The researchers estimate that 83% of lung cancer deaths in men and 76% of lung cancer deaths in women are the result of smoking.
Smoking also has an outsized role in cancers of the larynx. Fully 93% of larynx cancer deaths in women, along with 72% of larynx cancer deaths in men, are due to cigarette use, the researchers found.