Abstract
Background
Breast ultrasound and mammography were used in the detection of residual tumor after neoadjuvant chemotherapy. The aim of this study was to evaluate the correlation between clinical and pathological responses with breast density and IHC marker conversion to understand how this information might be used in the future to direct treatment.
Methods
We included 119 patients who underwent CNB and followed NACT. The breast density assessment was based on the mammography examination performed at the time of diagnosis. We evaluated the clinical and pathological responses to NACT by the UICC and Miller–Payne grading systems, respectively.
Results
Of 119 patients who met the inclusion criteria, patients with high pre-treatment IHC markers levels showed higher expression of IHC markers regardless of the post-treatment IHC marker level at baseline. However, breast and node tumor sizes before and after NACT were negatively correlated with hormone receptor conversion and positively correlated with Ki-67 conversion (P < 0.05). Patients with low BD were more likely to have a cCR, pCR, TNBC, and postmenopausal status than those with a high BD (P < 0.05). BD was significantly associated with PR and Ki67 conversion but not ER conversion.
Conclusion
Our prospective observational study demonstrated that IHC marker conversion could be used to identify lesion size changes and BD. We also found that a high BD was linked to clinical and pathological responses, molecular subtype, and menopausal status. In the future, additional studies are required to validate the predictive value identified by this research.
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Acknowledgements
We would like to extend our sincere gratitude to our departmental chair for the extensive support. In addition, we would like to give many thanks to our physicians, engineers, and nurses as well as other staff in the department.
Funding
This work was supported by the Heilongjiang Science and Technology Planning Project (Grants: YS17C22) and the Fundamental Research Funds for the Provincial Universities in 2018.
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ZY, ZXL, and ZDW designed this study. ZY, HYX, and ZDW collected data. WXL and ZXL performed the ultrasound and mammographic procedures. ZY, WXL, and HYX wrote this manuscript. ZDW and ZXL revised the manuscript. All authors read and approved the final manuscript.
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Ethical approval was provided by the Institutional Review Board of Harbin Medical University. Ethical approval was obtained from the Hospital Research Ethics Committee.
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Zhao, Y., Wang, X., Huang, Y. et al. Response to immunohistochemical markers’ conversion after neoadjuvant chemotherapy in breast cancer patients: association between imaging and histopathologic analysis. Clin Transl Oncol 22, 91–102 (2020). https://doi.org/10.1007/s12094-019-02112-z
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DOI: https://doi.org/10.1007/s12094-019-02112-z