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A case of malignant transformation of intraductal papillary mucinous neoplasm of the pancreas accompanied by metachronous triple primary cancer. Jpn J Cancer Chemother 2017; 44: 2026\u20138. (in Japanese)"},{"key":"17","unstructured":"17) Ueda A, Matsuo Y, Yamamoto S, et al. An intraductal papillary mucinous neoplasm of the pancreas with metachronous quadruple cancers. Jpn J Cancer Chemother 2023; 50: 1402\u20134. (in Japanese)"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18) Levink I, Bruno MJ, Cahen DL. Management of intraductal papillary mucinous neoplasm: controversies in guidelines and future perspectives. Curr Treat Options Gastroenterol 2018; 16: 316\u201332.","DOI":"10.1007\/s11938-018-0190-2"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19) Rubenstein JH, Enns R, Heidelbaugh J, et al. American Gastroenterological Association Institute guideline on the diagnosis and management of Lynch syndrome. 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