CXCL13 and lung carcinoma: ITGAE was co‐expressed with CXCL13 in CD8 T cells, a pattern also observed in our bulk data (R = 0.64; Figure S6C, Supporting Information) and in lung cancer studies.[27] Research showed that ITGAE+ CD8 T cells were upregulated in TLS‐pos gastric cancer.[12] In our samples, ST and IF staining revealed that ITGAE+ CD8 T cells were abundant in TLS‐pos MIBC (Figure S6D,E, Supporting Information).