A tumor-promoting role of MALT1 has been found in a subset of diffuse large B cell lymphoma (DLBCL) and MALT lymphoma, indicating MALT1 as an attractive anticancer drug target (Ngo et al., 2006; Hailfinger et al., 2009; Nagel et al., 2012). The gene discussed is MALT1; the disease is MALT lymphoma.