Fistula formation into other organs secondary to intraductal papillary mucinous neoplasm of the pancreas: A case report and literature review.

Based on the pathological examination of the surgical specimen, this case was diagnosed of MD-IPMN with invasive carcinoma and mechanical penetration or autodigestion was considered as the mechanism of fistula formation. Given the high risk of malignant transformation and intraductal dissemination of the tumor cells, aggressive surgical strategies, such as total pancreatectomy, should be recommended to achieve complete resection for MD-IPMN with fistula formation.