Previous studies from our lab and others’ have shown that ERK3 expression is upregulated in both lung adenocarcinomas (LUADs) and lung squamous cell carcinomas (LUSCs) of non–small‐cell lung cancers (NSCLC) and that ERK3 promotes lung cancer cell growth and invasiveness [3, 6]. Here, MAPK6 is linked to lung adenocarcinoma.