PDCD1LG2 and sarcoma: The PD-L1, PD-L2, and PD-1 expression levels were significantly different according to the histologic type (P = 0.000 for PD-L1; P = 0.004 for PD-L2; P = 0.000 for PD-1), while no significant difference regarding age and sex was evident for the sarcomas.