Thankyou , that has made me feel better about not knowing about retzius as yes it was more about nerve saving for erectile dysfunction, but I am learning everyday about this cancer and the treatments available, I shall keep educating myself as my aim when my husband has been treated is to bring awareness to others as until this happened I had no idea what a PSA Test was I had never heard of it and what it might mean in regard to prostate cancer , I have since found out that in my group of girlfriends all around 55 years old only 2 of 9 of them had heard of a PSA test an it’s relation to prostate cancer so I wasn’t alone , they are now encouraging their husbands to have a test !