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. 2018 Mar 1;15(5):6681–6687. doi: 10.3892/ol.2018.8145

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Figure 3. — Representative photomicrographs of TILs in two patients with untreated HER2-enriched type stage IV metastatic breast cancer. Each patient achieved a cCR. (A) one had a high TIL score and the other had a (B) low TIL score. Upper images, hematoxylin and eosin stained tissue in a field viewed at medium power (magnification, ×200). Middle images, CD4 immunostaining (magnification, ×400). Lower images, CD8 immunostaining (magnification, ×400). TIL, tumor infiltrating lymphocyte; HER2, human epidermal growth factor receptor 2.