As an aside, after a quick googling of marijuana and cancer this is the best scientific summary I have found:
“Cannabis: the evidence so far
Many of the studies put forth aren’t even about cancer.
Most of the studies were preclinical studies looking at cell culture models and mouse models.
Some of the studies found evidence that cannabinoids, under some circumstances, can actually stimulate cancer cell growth and possibly contribute to tumor progression.
Many of the studies involve trials of cannabinoids to treat cancer-related symptoms and side effects, not cancer itself.
Finally, the studies taken as a whole suggest that some purified cannabinoid agonists might be worth investigating further, but they do not provide a strong case for cannabis curing any kind of cancer.
Dr. Gorski concludes: