Only a few genes are recurrently mutated in patients with neuroblastoma. In a new study, whole-genome sequencing was used to analyse tumour samples from 39 patients with high-risk neuroblastoma and 17 patients with low-risk neuroblastoma. Rearrangements affecting the telomerase reverse transcriptase (TERT) gene were found in 31% of patients with high-risk neuroblastoma, but not in patients with low-risk disease. These results were confirmed in an additional cohort (n = 75 high-risk; n = 86 low-risk).