Abstract
Purpose
Tumor-infiltrating lymphocytes (TILs) are known to predict the therapeutic effect in breast cancer. Although a preoperative tissue biopsy can be used to evaluate TILs, TILs that are heterogeneously distributed might require examination of all preoperative tissue biopsy samples. We have recently reported that the TIL ultrasonography (US) score, as determined by characteristic US findings, provides excellent predictive performance for lymphocyte predominant breast cancer (LPBC). We herein aimed to determine whether the preoperative TIL-US score can more accurately predict LPBC than preoperative tissue biopsy.
Methods
We assessed 161 patients with invasive breast cancer that were treated with curative surgery between January 2014 and December 2017. Stromal lymphocytes were examined on preoperative tissue biopsy tissues and surgical pathological specimens. Breast cancer samples with ≥ 50% stromal TILs were defined as pre-LPBC (preoperative tissue biopsy) and LPBC (surgical pathological specimens). Useful factors for predicting LPBC were searched among clinicopathological factors.
Results
The TIL-US score cutoff value for predicting LPBC was 4 points based on the receiver operating characteristic curves (area under the curve: 0.88). Several significant predictors for LPBC were revealed by the undertaken multivariate logistic regression analysis (odds ratios: TIL-US score, 26.8; pre-LPBC, 18.6; HER2, 9.2; all, p < 0.05). The sensitivity, specificity, accuracy, positive predictive value, and negative predictive value were 0.74, 0.89, 0.85, 0.67, and 0.92 for the TIL-US score, respectively, and 0.51, 0.98, 0.87, 0.91, and 0.86 for the pre-LPBC, respectively.
Conclusion
TIL-US scores can predict LPBC preoperatively and are characterized by a significantly high sensitivity and negative predictive value.
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Acknowledgements
The authors would like to thank Noriyuki Shiroma at the Department of Aki-health Centre for preparing and managing the patient data.
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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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This study did not include animals. All procedures involving human participants were performed in accordance with the ethical standards set by our Institutional Research Committee (IRB No. 1166) and the 1964 Declaration of Helsinki (and its later amendments) or by comparable ethical standards.
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Kanou, A., Masumoto, N., Fukui, K. et al. The tumor-infiltrating lymphocyte ultrasonography score can provide a diagnostic prediction of lymphocyte-predominant breast cancer preoperatively. J Med Ultrasonics 49, 709–717 (2022). https://doi.org/10.1007/s10396-022-01240-4
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DOI: https://doi.org/10.1007/s10396-022-01240-4