Active Surveillance is a medical strategy used primarily for monitoring certain conditions, particularly in cases like prostate cancer. Instead of immediately starting treatment, doctors regularly check the patient's health through tests and examinations. This approach helps to avoid unnecessary treatments and their side effects when the disease is not progressing. Patients under Active Surveillance typically undergo routine check-ups, including blood tests and imaging studies. If there are signs of disease progression, treatment options can then be discussed. This method allows for a more personalized approach to care, focusing on the patient's specific situation and needs.