There is no authoritative information on the accuracy rate of axillary lymph node aspiration biopsy, but compared to lymph node dissection biopsy, its accuracy rate is lower. Axillary lymph node puncture biopsy is to use a thick needle to puncture the lymph nodes, obtain the local tissues of the axillary lymph nodes, and then do microscopic pathological examination, which is less accurate. Because it reflects the local tissue lesions, there is a possibility that the amount of tissue is not enough and the diseased tissue is not taken leading to a decrease in accuracy. Therefore, when high accuracy is required clinically, complete resection of lymph nodes can be done, and then sent for pathological examination, so that the accuracy will be improved, and diseased tissues, especially tumor tissues, can be detected pathologically. Puncture biopsy accuracy can also be improved if ultrasound-guided puncture sampling is performed. Regardless of the method of tissue biopsy, the accuracy is not 100%, so it is necessary to combine with other tests, such as laboratory tests, ultrasound, CT, MRI to make a comprehensive judgment.