CD274 and neoplasm: The existence of four different types of immune microenvironment (IME), that is, Type I: TIL+/PD‐L1+, Type II: TIL‐/PD‐L1‐, Type III: TIL‐/PD‐L1+, and Type IV: TIL+/PD‐L1‐, has been proposed by Teng MW et al based on the presence or absence of tumor‐infiltrating lymphocytes (TILs) and PD‐L1.6