Fig. 3: Cases from two patients who responded completely to neoadjuvant chemotherapy.

First case with high stromal tumor-infiltrating lymphocytes as seen on pre-therapy core biopsy (a H&E, b Cytokeratin AE1/AE3 highlighting the cancer cells with background unstained lymphoid cells). Second case with low Ki-67 proliferation index but high mitotic activity (c H&E, d Ki-67 immunohistochemical stain). Scale bar = 100 µ.