MKI67 and invasive breast carcinoma: Our results are consistent with the most comparable study published in 2019 by Luo et al., suggesting that comparison of pre- and post-NACT ADC values can be used to estimate the change in Ki-67 index in a retrospective study that included 87 patients with invasive breast cancer and showed a negative correlation between the change in ADC values and the Ki-67 index due to NACT24.