The authors Kim et al. [17] evidenced that histopathological grades (well-differentiated/moderately differentiated/poorly differentiated) had a significant positive correlation in gallbladder tumor cells with PDL1 expression at cut-off values of 1% (p = 0.001), 10% (p = 0.001), and 50% (p = 0.001). This evidence concerns the gene CD274 and gallbladder neoplasm.