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Computational portraits of the tumoral microenvironment in human breast cancer

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Abstract

Breast cancer is the most diagnosed cancer in humans. In recent years, myxoid and proportionated stroma have been described as clinically significant in many cancer subtypes. Here computational portraits of tumor-associated stromata were created from a machine learning (ML) classifier using QuPath to evaluate proportionated stromal area (PSA), myxoid stromal ratio (MSR), and immune stroma proportion (ISP) from whole slide images (WSI). The ML classifier was validated in independent training (n = 40) and validation (n = 109) cohorts finding MSR, PSA, and ISP to be associated with tumor stage, lymph node status, Nottingham grade, stromal differentiation (SD), tumor size, estrogen receptor (ER), progesterone receptor (PR), and receptor tyrosine-protein kinase erbB-2 (HER-2). Overall, MSR correlated better with the clinicopathologic profile than PSA and ISP. High MSR was found to be associated with high tumor stage, low ISP, and high Nottingham histologic score. As a computational biomarker, high MSR was more likely to be associated with luminal B like, Her-2 enriched, and triple-negative biomarker status when compared to luminal A like. The supervised ML superpixel approach demonstrated here can be performed by a trained pathologist to provide a faster and more uniformed approach to the analysis to the tumoral microenvironment (TME). The TME may be relevant for clinical decision-making, determining chemotherapeutic efficacy, and guiding a more overall precision-based breast cancer care.

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Data availability

Pathology data and the statistical analyses for the current study are available from the corresponding author upon reasonable request.

S. H. is the cofounder of CloudPath Diagnostics LLC, New York. The remaining authors declare no competing interests.

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Acknowledgements

We thank Alexander Perry and Kathy Quinn for their role as research coordinators. Figures were constructed at Biorender.com.

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Contributions

M. N., D. W., and S. H. developed the theoretical formalism. D. W., S. H., and M. N. contributed to the acquisition of data. D. W. performed the analytic calculations and performed the numerical simulations. D. W., S. H., H. C., M. A., and M. N. contributed to the final version of the manuscript.

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Correspondence to Dongling Wu.

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Wu, D., Hacking, S.M., Chavarria, H. et al. Computational portraits of the tumoral microenvironment in human breast cancer. Virchows Arch 481, 367–385 (2022). https://doi.org/10.1007/s00428-022-03376-7

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  • DOI: https://doi.org/10.1007/s00428-022-03376-7

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