Eichelser et al. [59] analyzed after-surgery and before-chemotherapy serum levels of six microRNAs known to be involved in tumor development and metastasis spread (miR-10b, -17, -34a, -93, -155, and -373) in 120 patients with primary tumor, equally distributed in ER+/PR+, HER2+ and TNBC groups, 32 patients with metastasis and 40 healthy controls. Here, ERBB2 is linked to neoplasm.