CEACAM5 and intrahepatic cholangiocarcinoma: Through multivariate logistic regression analysis, elevated CA19-9 level (P=0.037), elevated CA125 level (P=0.001), lower CEA level (P<0.001), tumor size≥5cm (P<0.001), single lesion (P=0.001), hypo-echogenicity (P=0.007), tumor necrosis (P=0.01), and absence of rim APHE (P=0.034) were identified as independent factors for the diagnosis of MF-ICC.