Fig. 4
A Invasive ductal carcinoma (HR+/HER2−) with pathologic complete response (pCR) after NAT in a 49-year-old woman: (a) pretreatment: a 71 mm mass occupying most glands in the upper right quadrant; (b) early neoadjuvant therapy (NAT): the lesions showed shrinkage with residual multinodular lesions (DD pattern). Invasive ductal carcinoma (HR+/HER2−) with non-pCR after NAT in a 70-year-old woman: (c) pretreatment: a 25 mm mass in the upper right quadrant; (d) early NAT: the lesions showed the simple concentric shrinkage (CS pattern) with a diameter reduction of 4 mm. B Invasive ductal carcinoma (HER2+) with pCR after NAT in a 44-year-old woman: (a) pretreatment: a 45 mm mass in the upper left quadrant; (b) early NAT: the lesion size was notably diminished with only residual enhancement foci (CS: CS to small foci pattern). Invasive ductal carcinoma (HER2+) with non-pCR after NAT in a 58-year-old woman: (c) pretreatment: a 29 mm mass in the upper left quadrant; (d) early NAT: the lesions showed the stable disease (SD pattern) with no changes in size or morphology. C Invasive ductal carcinoma (TNBC) with pCR after NAT in a 53-year-old woman: (a) pretreatment: a 43 mm mass in the upper left quadrant; (b) early NAT: the lesions showed the simple concentric shrinkage (CS pattern) with a diameter reduction of 13 mm. Invasive ductal carcinoma (TNBC) with non-pCR after NAT in a 65-year-old woman: (c) pretreatment: a 50 mm mass in the upper right quadrant; (d) early NAT: the lesions showed the stable disease (SD pattern) with no changes in size or morphology