We confirmed that FOXD3-AS1 is overexpressed in both blood and tissues of LUAD, LUSC, and SCLC samples when compared to control in the current study, based on hints from the Cancer Genome Atlas (TCGA) lung adenocarcinoma projects, lung squamous carcinoma projects, and Gene Expression Omnibus (GEO) datasets (GSE60052) as well as our RT-qPCR assays. Here, FOXD3 is linked to small cell lung carcinoma.