Eight TFH genes (e.g., CXCL13, ICOS, SH2D1A, TIGIT, and PDCD1) have been reported as signatures in breast cancer [6,15], while TNFRSF17, a plasma cell signature, is said to be the gene signature of TLSs in ovarian cancer [19]. Here, CXCL13 is linked to breast cancer.