ERBB2 and neoplasm: The HER2+ subtype displays positive correlations with calcification (p = 0.038, OR = 1.96), blood flow grading (p = 0.000, OR = 4.12), and tumor hardness (p = 0.000, OR = 1.02), indicating that tumors with higher blood flow grading, presence of calcification, and higher hardness are likely to be HER2+ subtype (Figure 5).