Research brief: No lung cancer risk from cannabis

Smoking cannabis does not increase lung cancer risk, even among heavy, long-term users, a US study has shown.

 Analysis of cannabis use among 611 people with lung cancer and 1,040 healthy controls, all of whom were aged 18-59 years, found no link between use of the drug and cancer risk when tobacco smoking was accounted for, delegates were told at a meeting of the American Thoracic Society held in San Diego, California, last week (www.thoracic.org).

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