“The use of cannabis among men has been linked to a significantly decreased risk for bladder cancer, according to a recent study; however, no cause and effect association has been found.”

“Bladder cancer is one of the most prevalent genitourinary malignancies with an estimated 72,570 new cases and 15,210 cancer-related deaths per year in the United States, and it is the fourth most common malignancy in men,” Anil Thomas, MD, study author and endourology fellow at Kaiser Permanente Los Angeles Medical Center, said in an e-mail communication. “Importantly, advanced bladder cancer is inherently challenging to treat due to its associated high mortality and lack of effective systemic therapies.””

More: http://www.cancernetwork.com/genitourinary-cancer/content/article/10165/2144158

“Association Between Cannabis Use and the Risk of Bladder Cancer: Results From the California Men’s Health Study… using tobacco only was associated with an increased risk of bladder cancer, whereas cannabis use only was associated with a 45% reduction in bladder cancer… cannabis use may be inversely associated with bladder cancer risk…”  http://www.ncbi.nlm.nih.gov/pubmed/25623697

http://www.thctotalhealthcare.com/category/bladder-cancer/