ERBB2 and neoplasm: IHC results indicated negative estrogen receptor (ER) and progesterone receptor (PR) status, Human Epidermal Growth Factor Receptor 2 (HER-2) negativity, positive E-cadherin, cytoplasmic positivity for P120, and positive GATA binding protein 3 (GATA3), vimentin, and Ki-67 (10%+) expression in tumor cells.