An important sign that radical prostatectomy has been successful is the PSA value: the lower it is, the better. The reason for this is that PSA (prostate-specific antigen) is only made in the prostate. This means that if the prostate and the tumor have been completely removed, the PSA value should go to zero. However, if the PSA value increases to above 0.2 after surgery, this is a sign that tumor cells are still present in the body. This condition is called a “recurrence” (the reappearance of a tumor), meaning that tumor activity is seen again after surgery. The first