Mutation pattern consistent with a tumor suppressor role in BACH2. Alterations in the BACH2 gene locus in patients with CAR T-cell lymphomas (Micklethwaite et al¹) and in CTCL (Park et al²). Black rectangles represent BACH2 exons. Coordinates shown use the hg19 genome build. SNV, single nucleotide variant; TSS, transcriptional start site.