In recent years, the incidence of breast cancer has surpassed that of lung cancer to become the number one cancer worldwide. Early detection, diagnosis and treatment are the keys to reduce the mortality rate of breast cancer. Therefore, let’s talk about how to perform breast screening today. Breast screening is an effective, easy and economical way to screen asymptomatic women for early detection, early diagnosis and early treatment. The peak incidence age of breast cancer in Chinese women is 45-54 years old, which is about 10 years earlier than that in Europe and the United States. Therefore, the Chinese guidelines recommend that the starting age for breast cancer screening for the general risk group is 40 years old, but for the high-risk group, the starting age of screening can be advanced to before 40 years old. For women at general risk 20-39 years old: breast screening is not recommended for this age group 40-70 years old: mammography every 1-2 years, combined with ultrasound is recommended for dense breasts 70 years old and above: mammography every 1-2 years Breast cancer high-risk groups Breast cancer high-risk groups include: 1. Those with obvious genetic predisposition to breast cancer: first-degree relatives with breast cancer or 2 or more second-degree relatives with breast cancer before the age of 50; 2 or more second-degree relatives with ovarian cancer before the age of 50; at least 1 first-degree relative with a known pathogenic genetic mutation in the BRCA1/2 gene or carrying a pathogenic genetic mutation in the BRCA1/2 gene themselves. 2. Patients with previous ductal or lobular atypical hyperplasia or lobular carcinoma in situ 3. Previous chest radiotherapy before the age of 30 years Screening recommendations: 1. Breast screening is recommended at an earlier age (<40 years) 2. 1 mammogram per year 3. 1 breast ultrasound every 6-12 months 4. 1 breast physical examination every 6-12 months 5. Combined breast-enhanced MRI if necessary