Pyjacker identified known events, like the activation of MECOM (16), MNX1 (31), and MN1 (32) in some AML cell lines and of GFI1, GFI1B, and PRDM6 in some medulloblastoma samples, as previously reported by Northcott and colleagues (refs. 29, 30; Supplementary Tables S3–S5). The gene discussed is MN1; the disease is medulloblastoma.