Cholangiocarcinoma.

Management of intrahepatic cholangiocarcinoma relies on a thorough understanding of the tumor's location and proximity to critical vasculobiliary structures. Mid-common bile duct tumors may require hemihepatectomy or pancreatoduodenectomy based on the status of the intraoperative frozen section. Distal common bile tumors are treated with pancreatoduodenectomy. When appropriate, volumetric assessment of the remnant liver should be performed to identify cases requiring preoperative liver augmentation strategies. A similar strategy should be employed for perihilar tumors, which require a right trisegmentectomy with bilioenteric reconstruction to achieve a negative margin. Adjuvant systemic therapy is recommended and increasing usage of neoadjuvant treatment is being incorporated into borderline resectable or regionally advanced cases.

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