**4.1 D'Amico risk classification of prostate cancer**

In 1998, Dr. Anthony D'Amico created a model that stratified patients with prostate cancer into those with a low, intermediate, or high risk of biochemical recurrencefree survival after surgery based on Gleason score at biopsy, clinical tumor-nodalmetastasis (TNM) stage, and pre-operative PSA level, as follows, in **Table 1** [7].
