The GAD1 mRNA expression level data in normal lung tissues available in public databases, such as the NIH Genotype‐Tissue Expression Project (https://www.gtexportal.org/), as well as our immunohistochemical staining results revealed no or low GAD1 expression in normal lung tissue, suggesting that GAD1 is specifically expressed in tumor cells and contributes to the progression of tumors in LADC. The gene discussed is GAD1; the disease is neoplasm.