CD274 and neoplasm: Meanwhile, the accuracy of PD-L1 expression on tumor and inflammatory cells (cutoff value, 10%) according to the biopsy site was as follows: bile duct, 86% (19/22) and 73% (16/22); ampulla of Vater, 100% (7/7) and 57% (4/7); liver, 92% (11/12) and 92% (11/12); and lymph node, 100% (4/4) and 25% (1/4), respectively (Tables 4 and 5).