MALT1 and neoplasm: We found that tumor development was enhanced in mice with a specific deletion of Malt1 in T cells, but not in macrophages (Fig. 5f, g), similar to the phenotype observed in Malt1 germline knockout (KO) mice, implying that Malt1 in T cells (Supplementary Fig. 5b) is critical in antitumor immune response.