摘要：

BACKGROUND: The use of neoadjuvant chemotherapy in treating breast cancer has shown efficacy in downstaging primary tumors, and allows breast conservative surgery to be performed instead of mastectomy. This study aims to evaluate patterns of clinical and pathological response after two cycles of neoadjuvant chemotherapy in patients with locally advanced breast cancer. MATERIALS AND METHODS: This is a prospective study. Ninety-eight patients who presented from April 2009 through May 2011 with locally advanced breast cancer and treated with neoadjuvant chemotherapy were included. RESULTS: The clinical response rate was 83%, 11 patients (11.2%) had a complete clinical remission (cCR), 71 had a partial remission (72.4%), 13 had stable disease (13.3%), and 3 had progressive disease (3.1%). Seven patients had complete pathological response. CONCLUSION: Neoadjuvant chemotherapy can achieve a high objective response rate in patients with locally advanced breast cancer even after two cycles. We recommend further research to find predictors for response.

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