ERBB2 and breast cancer: For what concerns the correlation between DWI and histological features of the lesions, no statistically significant association was found between ADC values and specific subtypes of breast cancer (luminal A, luminal B, HER2-positive, and triple negatives), but there was a high prevalence of low ADC values (equal or less than 1.1x10-3mm2/s) in G2 and G3 lesions, with a decrease of ADC mean values as the histological grade increases (Correlation’s coefficient = -0.647; p-value <0.001) (Figure 6).