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Poster display session

5038 - Impact of neoadjuvant therapy (NT) and pathological complete response (pCR) on breast-conserving surgery (BCS) in patients (pts) with breast cancer (BC): a meta-analysis.

Date

11 Sep 2017

Session

Poster display session

Presenters

Carmen Criscitiello

Citation

Annals of Oncology (2017) 28 (suppl_5): v43-v67. 10.1093/annonc/mdx362

Authors

C. Criscitiello1, M. Golshan2, W.T. Barry2, G. Viale1, S. Wong2, M. Santangelo3, G. Curigliano1

Author affiliations

  • 1 Division Of Experimental Therapeutics, Istituto Europeo di Oncologia, 20141 - Milan/IT
  • 2 Breast Surgical Services, Dana Farber/Brigham and Women's Cancer Center, Boston/US
  • 3 Abdominal Surgery And Transplantation, Department Of Advanced Biomedical Sciences, University Federico II, Naples/IT
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Resources

Abstract 5038

Background

We performed a meta-analysis of randomized trials that evaluated the pCR and surgical decisions after NT for BC.

Methods

Studies were retrieved by searching the PubMed database and the proceedings of major conferences. The primary outcome was BCS rate. Secondary outcomes were pCR rate and association to BCS. Meta-analyses were performed using random-effects (RE) models that use inverse-variance weighting for each treatment arm based on the number of evaluable pts. Point estimates are reported with 95% confidence intervals, and p 

Results

36 studies were identified (N = 12,311 pts). 17/36 studies reported both pCR and BCT for at least 1 treatment arm, and comprise the studies in this analysis. The number of arms per study ranged from 1 to 6, such that 42 independent units were available to evaluate the association between pCR and BCT. The BCS rate ranged from 5% to 76% across arms with an average BCS of 57% (95% CI 52%-62%). Significant heterogeneity was observed among the trials (Cochrane Q = 787, p 

Conclusions

This meta-analysis indicates that, despite increasing pCR, there is no concomitant increase in BCS. Future NT studies should reconsider using BCS as an endpoint.

Clinical trial identification

Legal entity responsible for the study

Carmen Criscitiello

Funding

None

Disclosure

All authors have declared no conflicts of interest.

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