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Molecular Subtypes and Tumor Response to Neoadjuvant Chemotherapy in Patients with Locally Advanced Breast Cancer

 Kim S.I.  ;  Sohn J.  ;  Koo J.S.  ;  Park S.H.  ;  Park H.S.  ;  Park B.W. 
 Oncology, Vol.79(5-6) : 324-330, 2011 
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Objective: Pathologic complete response (pCR) is the most predictive factor for patients with neoadjuvant chemotherapy and we investigated the rate of pCR according to molecular subtypes defined by immunohistochemical staining. Methods: Our subjects comprised 257 breast cancer patients who received 3 cycles of anthracycline/taxane-based neoadjuvant chemotherapy. The patients were classified into 4 subtypes: luminal A, luminal B, HER2 and triple negative. We analyzed the pCR rate and treatment outcome according to these subtypes. Results: Of a total of 257 patients, the pCR rate of luminal A, luminal B, HER2 and triple negative was 3.9, 5.0, 10.5 and 21.1%, respectively (p = 0.001). The 5-year disease-free survival of the pCR group (88.4%) was higher than that of the non-pCR group (65.6%), but it was not significant (p = 0.228). Among patients who have residual disease, the 5-year disease-free survival of luminal A, luminal B, HER2 and triple negative was 64.0, 65.7, 75.2 and 66.5%, respectively (p = 0.243). Triple negative and HER2 subtypes are more sensitive to neoadjuvant chemotherapy. Conclusion: To increase the pCR rate, type-specific approaches according to subtypes, such as an addition of trastuzumab, increasing the number of cycles or a novel regimen, should be considered.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실)
Yonsei Authors
구자승(Koo, Ja Seung) ORCID logo https://orcid.org/0000-0003-4546-4709
김승일(Kim, Seung Il)
박병우(Park, Byeong Woo) ORCID logo https://orcid.org/0000-0003-1353-2607
박세호(Park, Se Ho) ORCID logo https://orcid.org/0000-0001-8089-2755
박형석(Park, Hyung Seok) ORCID logo https://orcid.org/0000-0001-5322-6036
손주혁(Sohn, Joo Hyuk) ORCID logo https://orcid.org/0000-0002-2303-2764
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