Roy S. Herbst, MD, PhD, Deputy Director and Chief of Medical Oncology at Yale Cancer Center and Smilow Cancer Hospital, New Haven, Connecticut, US, and principal investigator in the trial, said: “These highly anticipated overall survival results, with 88 per cent of patients alive at five years, are a momentous achievement in the treatment of early-stage EGFR-mutated lung cancer. These data underscore that adjuvant treatment with osimertinib provides patients with the best chance of long-term survival.”