Of the eight cases featuring NRG1 fusions, two were lung adenocarcinoma, two were mucinous adenocarcinoma of the lung, two were colorectal adenocarcinoma, one was intrahepatic cholangiocarcinoma, and one was breast invasive carcinoma, thus exhibiting a predominance of lung cancer. The gene discussed is NRG1; the disease is lung adenocarcinoma.