Smoking and Tobacco

Tobacco smoke is a multi-organ carcinogen (Group 1)1. There is sufficient evidence that tobacco smoking causes cancers of the oral cavity and pharynx, nasopharynx, nasal cavity and paranasal sinuses, esophagus, stomach, colon and rectum, liver, pancreas, larynx, lung, cervix, ovary, kidney, bladder and other urinary (including ureter) and bone marrow (myeloid leukemia)1. Tobacco smoking is inversely related to endometrial cancer risk1.

In addition, for some cancers particularly those of the oral cavity, pharynx, larynx and oesophagus, there is a synergistic interaction between tobacco smoking and alcohol consumption1

Despite successes in tobacco control in Ontario, a large number of Ontario adults and youth still smoke. Smoking was responsible for approximately 9,800 new cases of cancer in 20091.



Cancer Care Ontario. Cancer Risk Factors in Ontario: Evidence Summary. Toronto, Canada, 2013