While the role and mechanistic consequences of loss-of-function (LOF) mutations in TP53, ID3 and TCF3 have been clarified to a large part, it remains unclear why mutation in the DDX3X gene are selected in BL and the question remains whether this protein is indeed a tumor suppressor or not, or whether it exerts both roles in a context-dependent manner (126). This evidence concerns the gene TCF3 and Burkitt lymphoma.