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Article Abstract
Objective: The use of neoadjuvant chemotherapy (NAC) has improved outcomes in breast cancer (BC). The residual cancer burden index (RCB) predicts prognosis. This study evaluated RCB as a prognosticator in BC subtypes treated with NAC.
Materials And Methods: A retrospective cohort of BC patients was analyzed. Five-year distant recurrence-free survival (DRFS), disease-free survival (DFS), and overall survival (OS) were analyzed. Statistical analyses included descriptive statistics, ANOVA, chi-square test, Fisher's exact test, Kaplan-Meier curves, Log-Rank test, and Cox regression.
Results: Among 562 women, RCB correlated with BC subtypes and predicted worse DRFS, DFS, and OS. In stratified analyses by molecular subtype, the association was significant only for luminal B and triple-negative subtypes, with inconsistent findings for luminal A and human epidermal growth factor type 2-overexpressed subtypes.
Conclusion: The RCB index was shown to be a prognostic marker in BC in a Brazilian population with BC. Significant associations were found only for the luminal B and triple negative subtypes. Further research is required to investigate the prognostic utility of RCB in other larger populations.
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| http://dx.doi.org/10.4274/ejbh.galenos.2025.2025-5-6 | DOI Listing |
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