Long term smoking causes increased risk for colorectal cancer.

According to senior author Michael J. Thun, MD, this 13-year study of 18,500 participants is the first to screen out other risk factors and thus show a direct link to colorectal cancer from smoking.

According to the International Agency for Research on Cancer (IARC), this reclassification raises the number of tobacco-related cancers to 17, among them being cancer of the oral cavity, pharynx, nasopharynx, nasal cavity, larynx, lung, esophagus, stomach, liver, pancreas, kidney, urinary bladder, uterine, cervix and myeloid leukemia. Dr. Thun concluded by stating that this research provides yet another reason not to smoke or to quit as soon as possible.

Dr. Thun and colleagues, we sincerely appreciate your work in bringing new evidence of smoking’s damaging effects. May tobacco-free lives swiftly become the norm for the health and happiness of all.

Reference
http://www.eurekalert.org/pub_releases/2009-12/aafc-csi113009.php,