MYCN and neuroblastoma: Cheung et al.10identified on a cohort of 40 diagnostic neuroblastoma MYCN amplified samples, mutations in the ATRX gene in 100 % (95 % CI 50 %‒100 %) of tumors from patients in the adolescent and young adult group (5 of 5), in 17 % (95 % CI 7 %‒36 %) of tumors from children (5 of 29), and 0 % (95 % CI 0 %‒40 %) of tumors from infants (0 of 6).