NRG1 fusions occur in ~ 3% NSCLC, ~ 1.5% pancreatic cancer and less than 1% of other cancers, and are detected frequently in KRAS–wildtype pancreatic ductal adenocarcinomas (PDAC) providing a potential drug target for those patients who do not benefit from KRAS inhibitors. This evidence concerns the gene KRAS and non-small cell lung carcinoma.