A member asked:

Has anyone ever got smoking related cancer(lung, throat, oral, etc) from marijuana smoking and no tobacco smoking? i cant find any documented cases

A doctor has provided 1 answer
Dr. Matthew Fero answered

Specializes in Medical Oncology

No smoking gun: In individual patients, it is hard to pinpoint which carcinogenic exposure (if any) caused their cancer. Carcinogens usually don't leave a telltale sign on the cancer cell itself. We must then rely on statistical inferences from studies of large groups of people. Though less well studied than tobacco, studies estimate the risk of lung cancer is 2x higher in pot smokers. Car crashes also go up ~4x.

Answered 5/1/2016

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