PD-L2 expression is mainly confined to DCs, monocytes, and macrophages, whereas that of PD-L1 is more widely distributed on not only T, NK, and B cells and macrophages but also myeloid DCs, epithelial cells, vascular endothelial cells, various tumor cells, and various tumor-infiltrating cells (1). Here, PDCD1LG2 is linked to neoplasm.