Table 2.

ΔADC determined from ADC values at MR1 and MR2 versus ΔSize are presented as mean ± standard error.

Pathological response	ADC MR 1 (× 10–3)	ADC MR 2 (× 10−3)	ΔADC (%)	ΔSize (%)
pCR	0.832 ± 0.044	1.214 ± 0.0599	44.36 ± 6.7	4.5 ± 3.3
Non-pCR	0.853 ± 0.027	0.954 ± 0.0267	7.54 ± 2.3	3.3 ± 1.7
Sig *	P = 0.882	P < 0.001	P < 0.001	P = 0.457

^*According to Mann-Whitney test

ADC: apparent diffusion coefficient; NCT: neoadjuvant chemotherapy; MR1: MR exam prior to treatment; MR2: MR exam after first cycle of treatment; pCR: complete pathological response; non-pCR: an absence of complete pathological response.