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The survival benefits of additional resection of the positive proximal ductal margin (PM) in hilar cholangiocarcinoma (HCCA) remains controversial. This retrospective study investigated the effectiveness of additional resection of the invasive cancer PM under different levels of preoperative carbohydrate antigen 19-9 (CA19-9).

Effectiveness of additional resection of the invasive cancer-positive proximal bile duct margin in cases of hilar cholangiocarcinoma