Cannabis use and risk of lung cancer: a 40-year cohort study of Swedish men

Background Given that cannabis (marijuana) is the most widely used illicit drug in the world, a critical—yet unresolved— medical and public-health issue is whether cannabis smoking might increase the risk of lung cancer. Cannabis and tobacco smoke contain many of the same potent carcinogens, but with cannabis smoke condensates being even more cytotoxic and mutagenic. We aimed to assess the role of cannabis use among adolescents and young adults for subsequent development of lung cancer. Methods A …