A new CDC report shows tobacco may be to blame for more than two million cancer cases diagnosed in the US from 1999 to 2004.
Smoking has been linked not only to lung cancer, but also bronchial, oral, stomach, kidney and cervical cancer, among others.
Experts analyzed several registries and found tobacco-related cancers are the highest among residents of the south. The report says more needs to be done to keep people from smoking, because tobacco use is still the leading preventable cause of disease and premature death.
Experts say some of the cancers studied have other risk factors that could contribute to their development, so tobacco may not be 100% attributable to disease development.