To further investigate the role of CASC19 in GC progression, we firstly determined CASC19 expression in four human GC cell lines (AGS, BGC-823, MGC-803, and HGC-27) and in a normal gastric mucosal epithelial cell line (GES-1) by quantitative real-time PCR (qRT-PCR). This evidence concerns the gene CASC19 and gastric cancer.