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Nothing to gain from chemo after pCR achieved


 

REPORTING FROM SABCS 2018

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– Women with localized breast cancer who achieve a pathological complete response (pCR) after neoadjuvant chemotherapy may have little to gain from subsequent adjuvant chemotherapy except toxicity, according to a patient-level meta-analysis of more than 27,000 women. The analysis, reported by lead investigator Laura M. Spring, MD, at the San Antonio Breast Cancer Symposium, confirmed that, compared with residual disease, pCR was associated with significantly reduced risks of event-free survival events (hazard ratio, 0.31) and death (HR, 0.22). Moreover, the EFS benefit of a pCR was similar whether women went on to receive adjuvant chemotherapy (HR, 0.36) or not (HR, 0.36) (P = .60 for difference). Dr. Spring discussed overall and subgroup findings, implications for use of neoadjuvant chemotherapy, and how these new data may inform escalation and de-escalation of adjuvant therapy.

Dr. Spring disclosed that she has a consulting or advisory role with Novartis and that she receives institutional research funding from Tesaro. The study was supported by grants from the National Cancer Institute and Susan G. Komen.

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