CD274 and neoplasm: Although a limited number of cases have been described, 50% of rhabdoid tumors show membranous expression of PD-L1 in 10–70% of tumor cells, with over 50% displaying high levels (>2/HPF) of tumor-infiltrating lymphocytes expressing PD-1 at levels ranging from 10 to 60%, which correlated significantly with tumor PD-L1 staining [120].