Fig. 1

a Representive photomicrographs of the breast cancer (hematoxylin-eosin staining: magnification, × 200). Pathological examination defined the mass as invasive ductal carcinoma, histological grade 3; (b) Estrogen receptor-positive: 90%; (c) Progesterone receptor-negative: 0%; (d) Human epidermal growth factor receptor 2-negative: score 1+; (e) Ki-67 labeling index, 10%; (f) Androgen receptor-positive: 95%