ERBB2 and lung adenocarcinoma: In an interesting article, recently published in Cancer Discovery, Tsurutani et al, presented the outcome of the HER2-expressing non-breast/ non-gastric HER2-mutant solid tumour cohort.6 ERBB2 mutations in advanced lung adenocarcinomas are associated with worse prognosis compared with patients with other oncogene-driven advanced lung adenocarcinomas.