Pathological Complete Response to Neoadjuvant Chemotherapy in a Patient with HER2-Positive Squamous Cell Carcinoma of the Breast. - Usui, Yuki; Matsunuma, Ryoichi; Yamaguchi, Kei; Hayami, Ryosuke; Muramatsu, Aya; Suzuki, Makoto; Tsuneizumi, Michiko (Case Reports in Oncology, 2021)