THC in marijuana shown to inhibit lung tumor growth

"Science Daily — The active ingredient in marijuana cuts tumor growth in common lung cancer in half and significantly reduces the ability of the cancer to spread, say researchers at Harvard University who tested the chemical in both lab and mouse studies."

They don't know how this is working yet, but speculate that the THC might be turning off the cell cycle, or interfering with the growth of the cancer cell.
Now that there is some data supporting THC's anti-cancer properties, I wonder how this will impact the cannabis clubs. Terminally ill patients are already using medical marijuana for nausea, appetite stimulation, pain, and other issues.

http://www.sciencedaily.com/releases/2007/04/070417193338.htm