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Tommy Chong, half of the comedic duo Cheech & Chong, is undergoing treatment for rectal cancer, his rep confirmed to E! News.
Chong, a well-known marijuana aficionado, credited the substance for helping to cure his cancer in 2012. "I've got prostate cancer, and I'm treating it with hemp oil, with cannabis," he told CNN in 2012. "So [legalizing marijuana] means a lot more to me than just being able to smoke a joint without being arrested."