Table 1.

Classification of tumors based on presence of tumor infiltrating lymphocytes (TIL) and PD-L1 expression (based on Teng et al. [9])

Type I: Adaptive immune resistance TIL+ PD-L1+	Type II: Immunological ignorance TIL- PD-L1-
Type III: Intrinsic induction TIL- PD-L1+	Type IV: Tolerance TIL+ PD-L1-