The investigation showed that the level of PGM2L1 expression positively correlated with the infiltration level of B cell (r = 0.501, p = 0.00219), Neutrophils (r = 0.352, p = 0.0378) and DCs (r = 0.366, p = 0.0307) in CCA (Figure 4A). This evidence concerns the gene PGM2L1 and cholangiocarcinoma.