BATF3 and neoplasm: For example, cancers associated with activating mutations in the WNT/β‐catenin pathway can impair T cell priming by restraining the function of antigen cross‐presenting basic leucine zipper transcriptional factor ATF‐like three lineage dendritic cells (BATF3 DCs).233 In mice, tumors harboring constitutively active variants of β‐catenin limit BATF3 DC migration to tumor draining lymph nodes, preventing naïve T cell priming and tumor cell infiltration.