MKI67 and breast carcinoma: The patient had further undergone nipple-sparing mastectomy (NSM) and SNB, followed by immediate breast reconstruction using an eLDMCF for her left breast cancer, which was invasive ductal carcinoma and had both estrogen and progesterone receptor positivity (both Allred score 8), human epidermal growth factor receptors type 2 negativity, and a high Ki-67 labeling index of 80%.