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Abstract #4115

Radiomic Analysis of Breast Cancer Peritumoral Tissue on Contrast Enhanced MRI Prior to Neoadjuvant Chemotherapy

Eva Gombos1, Carlos Aramayo2, and Jayender Jagadeesan3

1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Geisel School of Medicine at Dartmouth, Hanover, NH, United States, 3Surgical Planning Laboratory, Brigham and Women's Hospital, Boston, MA, United States

This study set out to identify key radiomic features in peritumoral breast tissue associated with a high response to neoadjuvant chemotherapy, defined as a >90% reduction of tumor cells. For each case, a tumor label map and 5 distinct masks at 2.5, 5, 10, 15, and 20mm beyond the tumor border were created using pretreatment DCE-MRIs. Fifty-seven metrics were then computed for each mask using the 3D Slicer HeterogeneityCAD module. Using final pathology reports, cases were separated into “low-response” and “high-response” groups. Statistical correlation using univariate Mann-Whitney tests to compare the two response groups ultimately yielded 6 radiomic features.

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