Introduction Breast nodules are a three-dimensional breast lesions detected by breast ultrasound, including breast cysts, solid or mixed mass, intraductal mass and breast space-occupying lesions. In recent years, with the development of ultrasound technology, the detection rate of breast nodules has gradually increased. According to data from the Netherlands and the United States, around 3% of women’s consultations with their general practitioners (GPs) are about breast changes (1, 2).