We found that FOLRα is expressed in various histological subtypes of gastric cancer, with this expression being more frequent in HER2‐positive cases than in HER2‐negative ones, as previously shown for EGFR mutation‐positive lung adenocarcinoma,20 suggestive of an association between FOLRα expression and an aggressive phenotype of cancer. This evidence concerns the gene ERBB2 and lung adenocarcinoma.