R0 resection and adjuvant chemotherapy may be mandatory to achieve long-term survival for patients with cholangiocarcinoma.

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A nomogram predicting malignancy in patients with BD-IPMN was constructed using a logistic regression model. This nomogram may be useful in identifying patients at risk of malignancy and for selecting optimal treatment methods. The nomogram is freely available at http://statgen.snu.ac.kr/software/nomogramIPMN.

Adjuvant gemcitabine plus S-1 chemotherapy may be one of several factors contributing to improved outcomes after aggressive surgical resection of advanced biliary carcinoma in recent years.

Postoperative CA19-9 level is a better prognostic factor than preoperative CA19-9 level, and curative surgery for resectable pancreatic cancer should be tried regardless of the preoperative CA19-9 level.

PBD had a notable influence on bile microbial contamination, including a higher rate of antibiotic resistance. Therefore, specific antibiotic prophylaxis based on bile culture is required for preventing infectious complications in pancreatoduodenectomy patients who undergo PBD.

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