Co-incubation of platelets with all tumor cell lines resulted in platelet activation, as indicated by P-selectin (CD62P) induction (Fig. 1g), however only co-incubation with PD-L1 positive NCI-H226 and NCI-H460 cells resulted in an increased PD-L1 expression on the platelet surface (Fig. 1h). The gene discussed is SELP; the disease is neoplasm.