CD274 and neoplasm: Although no differences were apparent in the percentage of myeloid cell present in the tumor (Fig. 6a), a lower percentage of phagocytic myeloid cells, identified by their positivity for GFP arising from the phagocytosis of GFP-expressing tumor cells, was found for anti-PD-L1 treated groups alone or in combination with CM-1758 (Fig. 6b).