70% of respondents replied that patients with luminal A, low- or intermediate-grade tumours could defer surgery and begin their treatment with neoadjuvant hormone therapy, whereas for triple-negative patients and HER2-/Neu-positive patients, 95% of specialists answered that they agreed that they should begin (in the case of a recent diagnosis) or continue with the standard protocols of neoadjuvant or adjuvant chemotherapy, which are already in place. This evidence concerns the gene ERBB2 and neoplasm.