If a woman finds a breast lump on her own examination, or if a breast lump is found by ultrasound or mammography, it is only the first step in detecting breast cancer, and then it is necessary to clarify whether the breast lump we touch or the breast lump found by ultrasound and mammography is breast cancer or not. How to obtain tumor tissue for pathological examination? One is excisional biopsy, which is the surgical removal of the entire lesion for histopathological examination; the other is to obtain a part of the tumor tissue through puncture for pathological examination. Although excisional biopsy is the traditional way to obtain lesion tissues, if the nature of the lesion is clearly benign, excision of the lesion is unnecessarily over-treated in many cases. The results of numerous clinical studies have shown that puncture does not increase the chance of local recurrence, and there is no evidence that puncture. Puncture causes tumor dissemination and does not stimulate a benign lesion to become a malignant one. Puncture examination has been confirmed to be reliable by the results of relevant studies in Europe and the United States. Currently, ultrasound-guided puncture histopathology can be applied to lesions over 1 cm detected by ultrasound; for lesions below 1 cm detected by ultrasound, etc., minimally invasive biopsy methods guided by imaging methods are currently recommended.