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

Neoadjuvant therapy in the treatment of breast cancer is not only a means of breast conserving surgery, but also a sensitive scheme for patients, in order to reduce the treatment grade, low toxicity and high efficiency. Chemotherapy combined with trastuzumab and pertuzumab is the standard neoadjuvant therapy for HER2 positive breast cancer patients. Paclitaxel plus carboplatin (TCb) is the first choice of chemotherapy recommended by major guidelines; As an alternative, single drug Taxus (T) is also listed as class I recommendation in the latest CSCO guidelines, but the level of evidence is slightly insufficient. In the HER2 positive neoadjuvant therapy population, relatively early and low-risk patients may obtain good curative effect in the treatment of single drug taxane chemotherapy combined with double target therapy. The project plans to adopt an ambispective cohort study, based on the large sample breast disease cohort database established by the breast center of Peking University People's Hospital, and retrospectively include the HER2 positive breast cancer patients with clinical stage T1c, lymph node negative and receiving Taxanes combined with double target neoadjuvant therapy admitted to the center from January 1, 2019 to December 31, 2024. Patients of the same type were prospectively included from January 1, 2025 to December 31, 2028. Objective to evaluate the efficacy and safety of Taxanes combined with double target neoadjuvant therapy.

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