chemotherapy for ER-positive breast cancer which is less chemosensitive than for ER-
negative breast cancer in order to avoid unnecessary chemotherapy. In the present study,
intrinsic subtyping by PAM50 was evaluated for its ability to predict a response to
chemotherapy. Patients and Methods For this study, 124 patients with ER-positive breast
cancer treated with neoadjuvant sequential paclitaxel and FEC (NAC) were evaluated …