ERBB2 and breast cancer: MTV_B and TLG_B could discriminate responders vs. non-responders both in Luminal B (cut-off: ≤3.9 cm3 and ≤32.87; AUC = 0.72 and AUC = 0.68, respectively) and Luminal B + HER-2 BC (cut-off: ≤4.78 cm3 and ≤25.6; AUC = 0.76 and AUC = 0.75, respectively).