“Accumulating evidence indicate that the endocannabinoid system is dysregulated in prostate cancer… Overexpression of several components of the endocannabinoid system correlate with prostate cancer grade and progression, potentially providing a new therapeutic target for prostate cancer… several cannabinoids exert antitumoral properties against prostate cancer, reducing xenograft prostate tumor growth, prostate cancer cell proliferation and cell migration… the therapeutic potential of cannabinoids against prostate cancer is very promising…”

http://www.ncbi.nlm.nih.gov/pubmed/21912423