LTBR and neoplasm: Second, we took advantage of human LUAD and normal lung tissue scRNA‐seq data and found that the highest mRNA level of LTΒR was observed in TAMs rather than other tumor‐infiltrated immune cells and even the macrophages of normal lung tissues (Figures 1M,N and S4A,B), while its ligand LTα1β2 was mainly expressed by lymphoid cells, including T, B, and NK cells (Figure S4C), suggesting potential crosstalk of LTα1β2/LTBR between lymphoid cells and TAMs.