The varying immunohistochemical subtypes of breast cancer form the basis of multiple research modules specifically designed to assess the Tumour infiltrating lymphocytes in triple-negative breast cancer(TNBC), human epidermal growth factor receptor 2(HER2) - enriched breast cancer and hormone-receptor breast cancer(HRBC) [3,4]. The gene discussed is ERBB2; the disease is triple-negative breast carcinoma.