The use of public data mining showed that CHRDL2 expression was linked to immune cell infiltration in gastric cancer, and this link was strengthened when a bulk of infiltrating immune cells, such as NK cells, mast cells, macrophages, Th1 cells, B cells, DC, Tgd, Tcm, and Treg cells, were CHRDL2 positive. This evidence concerns the gene ABCA1 and gastric cancer.