LCN2 and cancer: Various tumor‐associated immune cells, including TAMs, cancer‐associated fibroblasts, mast cells, and neutrophils, play crucial roles in lymphangiogenesis.[16, 17, 18, 23] Furthermore, given that our results indicate LCN2 inhibits LN metastasis of GC via CCL5‐dependent macrophage activation, we hypothesized that TAMs may also be involved in LCN2‐dependent lymphangiogenesis.