Myth 1: If you don’t touch a lump, you don’t have breast cancer? It may be because the lump is too small to reach or the self-examination technique is incorrect, or it may be some other forms of breast cancer. Myth 2: Can puncture cause breast cancer to metastasize? There is no evidence that CNB can promote malignant transformation of benign breast disease or lead to breast cancer implantation or metastasis, and CNB is a safe and reliable biopsy method that is worth promoting. Myth 3: Will the prognosis be affected if breast biopsy is not treated immediately? Breast cancer is a chronic disease and generally speaking, starting treatment within 3~4 weeks after puncture biopsy or 2 weeks after open surgical biopsy does not affect the outcome. Myth 4: Pre-operative treatment will cause tumor development and should be operated first? Research shows that chemotherapy, endocrine therapy and targeted therapy as systemic treatment can not only shrink the tumor on the breast, but also control metastases and micrometastases, etc. Myth 5: Breast-conserving is not safe? Breast-conserving surgery improves the quality of life of patients, but not at the cost of high recurrence or even sacrifice of life. Irregular treatment is the main factor leading to postoperative recurrence. Myth 6: Treatment starts with expensive, good chemotherapy drugs with mild side effects? Different patients may have different effects and side effects to different chemotherapeutic drugs, so the “good drug” is different from person to person. Myth 7: Endocrine therapy is not as reliable as chemotherapy? Endocrine therapy is an important tool in the anti-tumor treatment of breast cancer, and it is highly effective and low toxic, with long duration of efficacy, and in some patients it can reach or even exceed the effect of chemotherapy. Myth 8: Breast enlargement must be treated or it will become cancerous? Only a few cases of severe atypical hyperplasia are likely to develop into breast cancer and need to be treated.