A large epidemiologic study led by researchers in Los Angeles was conducted on 1,200 cancer patients and 1,000 cancer-free control subjects to potentially find a link between marijuana use and cancer.  Researchers studied the possible genetic differences between cancer patients and the controls and found no clear pattern regarding cancer risk.  A potential flaw in the study is that marijuana use has no standardized measurement, so information about quantities and dosages of a patient’s past are much harder to gather.  Despite certain limitations, researchers concluded that the results do not suggest any relation between marijuana use and cancer. 

For further reading on this study please visit: