Table 5. pCR rate according to the intrinsic biological subtypes from CNB in NAC patients.

Subtype*	No. of pCR patients	NAC group†	pCR rate (%)
Luminal A	0	10	0
Luminal B–	6	42	14.3
Luminal B+	8	24	33.3
HER2	6	22	27.3
TNBC	13	49	26.5
Total	33	147	22.4

pCR=pathologic complete response; CNB=core needle biopsy; NAC=neoadjuvant chemotherapy; HER2=human epidermal growth factor receptor 2; TNBC=triple-negative breast cancer.

^*Classified from CNB result. luminal A (ER+ and/or PR+, HER2-, Ki-67 low); luminal B- (ER+ and/or PR+, HER2-, Ki-67 high); luminal B+ (ER+ and/or PR+, any Ki-67, HER2+); HER2 (ER-, PR-, HER2+); and TNBC (ER-, PR-, HER2-); ^†Five patients were equivocal HER2 result and cannot classified subtype.