Four Cycles Taxane With Trastuzumab and Pertuzumab Neoadjuvant Therapy Among Low Risk HER2 Positive Patients

Inclusion Criteria

• •1. Patients with HER2 positive breast cancer were diagnosed by biopsy in Peking University People's hospital;
• •2. The clinical stages were T1c, N0, M0;
• •3. Received treatment in our hospital and had hospitalization records;
• •4. Has signed and agreed to participate in the PKUPH breast disease cohort study;
• •5. It is up to the clinician to decide whether to add anthracycline chemotherapy in the adjuvant treatment stage.