Researchers at Harvard Medical School say the active component of marijuana may enhance the virus that causes a rare type of skin cancer called Kaposi's sarcoma. While most people are not at risk of developing this cancer, AIDS patients are transplant recipients are. It's the weakened immune system that puts some at risk for this disease. And these are the people who should discuss with their doctors the costs of using marijuana medicinally or recreationally.It may take only small doses of tetrahydrocannabinol (THC) -- the ingredient that gives marijuana users a "high" -- to cause cells to become infected and then multiply, according to a study reported in the August 1 issue of Cancer Research.
Previous studies have indicated this very same association between marijuana use and Kaposi's sarcoma. But this study shows THC itself is the driving force.
