The peritumor ADC value was significantly associated with axillary LNM (p = 0.012) and LVI (p = 0.010), but was not associated with tumor size (p = 0.058), histological grade (p = 0.123), ER status (p = 0.105), PR status (p = 0.525), HER2 status (p = 0.409), or the Ki-67 index (p = 0.513). The gene discussed is ERBB2; the disease is neoplasm.