Because paradoxical hypermethylation‐associated overexpression of GAD1 was reported recently in colorectal and liver cancers5 and GAD1 overexpression has been reported in various neoplastic tissues, such as oral, nasopharyngeal, colorectal, liver, and gastric cancers,5, 6, 7, 8, 9 we focused on GAD1 as a potential LADC‐related gene in the present study. Here, GAD1 is linked to gastric cancer.