ZCCHC7 and acute lymphoblastic leukemia: We found that several of the patients assigned to the ‘multi-class’ group according to the DNA methylation classifier harbored fusion genes with PAX5 as one of the fusion partners, including the known t(9;12)PAX5/ETV6 and inv(9p13.2)PAX5/ZCCHC7 fusion genes previously reported in ALL [19-21].