PD-L1 Expression in TNBC: A Predictive Biomarker of Response to Neoadjuvant Chemotherapy?

Table 2

Association between stromal TILs, the expression of PD-L1 on tumor cells and inflammatory infiltrate, Ki-67 value, cT, cN, and pCR in the univariate analysis.

	(%)	pCR
			value
Stromal TILs
Absent/low	32 (59%)	8	<0.001
High	22 (41%)	11
PD-L1 on tumor cells
0%	35 (65%)	11
≥1–<25%	15 (28%)	4
≥25%	4 (7%)	4	0.024
PD-L1 on inflammatory cells
Negative	10 (19%)	3	ns
Positive	44 (81%)	15
Ki-67
<50%	14 (26%)	4	ns
≥50%	40 (74%)	15
cT
T1	7 (13%)	3	ns
T2–T4	47 (87%)	16
cN
Negative	30 (56%)	13	ns
Positive	24 (44%)	6