Breast cancer treatment involves stratified treatments, which may include surgery (including breast conserving therapy, mastectomy, sentinel-node biopsy, and axillary dissection), radiotherapy, chemotherapy with or without anti-HER2 therapy (i.e., a blocker of the function of the protein in tumors whose HER2 gene is stuck on overdrive) and endocrine therapy (Senkus et al., 2015; National Institute for Health and Care Excellency (NICE), 2018), all of which have long-term impacts on women's health and well-being. This evidence concerns the gene ERBB2 and breast cancer.