Comparison of prognostic factors and their differences in intrahepatic, hilar, and distal cholangiocarcinoma: A systematic review and meta-analysis

Figure 1  The specific process of literature researching and selection.

Figure 2 Forest plots comparing the long term survival and the tumor biological features between intrahepatic cholangiocarcinoma and perihilar cholangiocarcinoma. A: Overall survival between intrahepatic cholangiocarcinoma vs perihilar cholangiocarcinoma; B: Node metastasis; C: Neural invasion; D: Vascular invasion. PHCC: Perihilar cholangiocarcinoma; IHCC: Intrahepatic cholangiocarcinoma.

Figure 3 Forest plots comparing the long term survival and the tumor biological features between intrahepatic cholangiocarcinoma and distal cholangiocarcinoma. A: Overall survival between intrahepatic cholangiocarcinoma vs distal cholangiocarcinoma; B: Node metastasis; C: Vascular invasion. IHCC: Intrahepatic cholangiocarcinoma; DCC: Distal cholangiocarcinoma.

Figure 4 Forest plots comparing the long term survival and the tumor biological features between perihilar cholangiocarcinoma and distal cholangiocarcinoma. A: Overall survival between perihilar cholangiocarcinoma and distal cholangiocarcinoma; B: Node metastasis; C: Neural invasion. PHCC: Perihilar cholangiocarcinoma; DCC: Distal cholangiocarcinoma.