These guidelines will focus on early diagnosis of breast cancer in patients who have signs and symptoms and an average risk of developing breast cancer. The goal is to identify breast cancer as soon as possible, and provide diagnosis and treatment in the earliest stages, when it is more effective, has less complications and is less costly; ultimately the objective is to improve the quality of life and increase the survival of patients. The guidelines will also address screening recommendations for asymptomatic patients, although it is not recommended that public efforts and resources be allocated to developing a nationwide, population-based screening program until diagnostic imaging, pathology services, and referral for surgery and specialized treatment are established and functioning. In facilities or programs where these services are available, accessible and functioning, opportunistic screening can be a viable option in accordance with the recommendations from the WHO.