http://www.iflscience.com/health-and-medicine/cannabis-cannabinoids-and-cancer-%E2%80%93-evidence-so-far

What are cannabinoids and how do they work?
Can cannabinoids treat cancer? (including lab research, clinical research and unanswered questions)
Can cannabis prevent or cause cancer?
What about controlling cancer symptoms such as pain or sickness?
Is Cancer Research UK investigating cannabinoids?
It’s natural so it must be better, right?
“Have you seen this video? This guy says cannabis cures cancer!”
“It’s all a big conspiracy – you don’t want people to be cured!”
“What’s the harm? There’s nothing to lose.”
“Big Pharma can’t patent it so they’re not interested.”
“Why don’t you campaign for cannabis to be legalised?”