CD274 and neoplasm: We therefore analyzed the PDL1 expression in the major LN stromal cell subsets [CD31+/podoplanin+ LECs, CD31+/podoplanin− BECs, CD31−/podoplanin+ follicular reticular cells (FRCs), and CD31−/podoplanin− double negative (DN) cells; Figure 3A] in tumor draining inguinal LNs and in inguinal LNs of naive mice.