PDCD1LG2 and neoplasm: As compared to AC, cells in SCC stroma were more often PD-L1 positive (p = 0.044), as were tumor (p = 0.000) and stroma compartment cells (p = 0.005) for PD-L2, based on H-scores of 0 (i.e., negative) versus values exceeding 0 (i.e., positive) (Table 2).