ERBB2 and breast cancer: However, the advantage of CEUS radiomics was not reflected in predicting Luminal B breast cancer and TNBC; the reason could be that Luminal B includes both HER2-positivity and HER2-negativity subtypes, which may overlap with other non-Luminal B in the characteristics of HER2 expression; hence, its CEUS performance is not easy to distinguish.