ERBB2 and breast cancer: Although no significant correlations were found between pCR and pretreatment clinical and pathological characteristics of HR-positive, HER2-negative breast cancer, the patients having tumors with a high pSUVmax (≥9.55) achieved more pCR compared to the low pSUVmax group (17.9% vs. 1.4%, p = 0.013) (Table 2).