Hypofractionated 2A breast cancer represents a situation in which the tumor cells have a high degree of malignancy and the staging is early to middle stage. Breast cancer is a common malignant tumor in women, and the risk factors for the development of breast cancer include heredity and gene mutation. Pathological biopsy of cancer cells can determine the degree of differentiation, which can be classified into high, medium and low levels, with the higher level representing the lower degree of differentiation of cancer cells, the higher degree of malignancy and the worse prognosis. 2A is the staging based on the primary tumor, the degree of lymph node metastasis, and whether distant metastasis has occurred; micro metastasis; or metastasis to 1-3 axillary lymph nodes; no distant metastasis. Most of the cases belong to the middle stage in the early stage, and can be treated by surgery and other methods. If you are suffering from breast cancer, you should actively consult with regular hospitals and standardize the treatment under the guidance of doctors.