CCL21 and cancer: We collected signatures of some key pathways in cancer immunology, including angiogenesis, CYT, GEP, T‐cell exhaustion, and TLS, and found that, except for CCL19 and CCL21 in the TLS pathway, which were negatively correlated with the IGLoS scores, the vast majority of genes in the other pathways were positively correlated with the IGLoS scores, with the most significant correlation being with GEP (Figure 4I).