ERBB2 and breast cancer: Most presented with ductal primary BC (n = 24, 88.9%), received a breast conservative surgical treatment (n = 13, 48.1%), and different systemic treatment types (alone or in combination), including chemotherapy (n = 12, 44.4%), endocrine therapy (n = 21, 77.7%), HER2‐directed therapy (herceptin) (n = 6, 22.2%), and radiotherapy (n = 16, 59.2%).