THE KEY arises from experience caring for patients at Prostate Oncology Specialists (PROS), an innovative medical group on the forefront of prostate cancer for over 20 years. PROS invited 30 leading authorities to contribute their expertise in patient-friendly language. THE KEY is a vital resource for patients facing a huge dilemma – treatment is irreversible. Studies show that treatment regret results from choices made with incomplete information. THE KEY is a clear and unbiased resource to counterbalance the tunnel vision prevalent in this surgically-dominated industry. THE KEY overcomes the problem of data overload by guiding patients to stage-specific information. A patient’s stage is determined with a short, self-administered quiz. Material is provided for every stage, but the individual patient can bypass over half the book by avoiding advice only pertinent to other stages. Learn about your Stage. SKY (Low-Risk) , TEAL (Intermediate-Risk), AZURE (High-Risk), INDIGO (Relapsed Disease), and ROYAL (Hormonal-Resistance or Mets Outside the Pelvic Nodes).