Institution type (public or private), diagnosis time in months, lawsuit for receiving proper treatment, family history records for breast cancer, breast cancer progression, radiotherapy performed, surgery performed to the patient, tumor stage, chemotherapy regime including tamoxifen and its dosis, disease cycle, original histopathological classification, estrogen receptors detection like having HER2, BRCA and Fish presence, tumor clinical classification at diagnosis time, Karnofsky index and other comorbidities presence. This evidence concerns the gene ESR1 and breast cancer.