Study fails to find cancer link to marijuana use

October 10, 2006
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ANN ARBOR—Although marijuana smoke is known to contain cancer-causing agents, and many studies in humans, animals and cell cultures have indicated that marijuana smoking may predispose a person to cancer, a large epidemiologic study of cancer patients and cancer-free controls in Los Angeles has found no clear association between pot-smoking and cancer.

” We didn’t find any evidence for an increased risk of head and neck or lung cancers among heavy, long-term marijuana users,” said study leader Hal Morgenstern, chair of epidemiology at the University of Michigan School of Public Health. ” I wouldn