Here's a great video explaining the mechanism of how cannabinoids (THC & others), the compounds in maijuana, prevent cancer growth and cause cancer cells to eat themselves.

In this video series, started off with Dr. Robert Melamede, Professor of Biology at the University of Colorado, the effect is detailed.  Of course none of this constitues a patentable cure, so drug companies will not only fail to reseach it.  But will actually suppress it, as it cuts into their huge investment in cancer "cures".

Will be checking into this further to try and find proof that holds up to scientific scrutiny.  Any help would be appreciated, thanks.