1. Medication Guide: HER2-positive patients can choose Herceptin, lapatinib and other targeted drugs for treatment.
2. To judge breast cancer prognosis: HER2 gene amplification patient prognosis difference, disease-free survival and total survival significantly shortened.
3. Breast cancer endocrine treatment Guide: HER2 gene amplification patients are not sensitive to endocrine therapy.
4. To guide the choice of breast cancer-assisted chemotherapy drugs: HER2 gene amplification of patients with low response rate to CMF chemotherapy program, it is advisable to use yew alcohol and cyclic high-intensity chemotherapy drugs.