Fig. 1

Representative images of PD-L1, p53 and CK17 expression by IHC. a PD-L1 expression negative. b PD-L1 expression of TCs moderate positive. c PD-L1 expression of TILs moderate positive. d p53 expression negative. e p53 expression moderate positive. f p53 expression strong positive. g CK17 expression negative. h CK17 expression weak positive. i CK17 expression strong positive. Scale bars: 100μm