In breast cancer, which is the most frequent malignancy in women,1 triple‐negative breast cancer (TNBC), detected as negative expression of estrogen receptor (ER), progesterone receptor (PR), and epidermal growth factor receptor 2 receptor (HER2) by immunohistochemistry, is easy to relapse and metastasize.2 Here, ERBB2 is linked to breast carcinoma.