Evidence for breast cancer and prostate cancer was considered inconclusive. Gonorrhea is also associated with increased risk of prostate cancer. The risk of prostate and testicular cancer is not affected by vasectomy. Testosterone does not appear to increase the risk of developing prostate cancer. Folic acid supplements have no effect on the risk of developing prostate cancer. There is some evidence that circumcision is associated with lower risk of prostate cancer. These studies identified several SNPs which substantially affect the risk of prostate cancer. It may also increase the risk of certain forms of prostate cancer. I prostate cancer during a routine test. Studies on prostate cancer have been contradictory. Nelson had prostate cancer surgery in 2000. The medication has been studied as an antiandrogen in the treatment of prostate cancer. Ritchie died from complications related to prostate cancer. The dosages used are lower than those used in the treatment of prostate cancer. Many men never know they have prostate cancer.