MKI67 and neoplasm: The immunohistochemistry (IHC) found estrogen receptors (ERs), which were intensely positive in more than 90% of tumoral cells (Allred score 8); progesterone receptors (PR), which were intensely positive in approximately 30% of tumoral cells (Allred score 6); HER2neu (human epidermal growth factor receptor 2) 2+; and the proliferation marker Ki67, in 40% of the tumor cells.