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A difficult diagnosis of intraductal papillary neoplasia of the bile duct (IPNB): A case report and review of surveillance, epidemiology, and end results

Intraductal papillary neoplasm of the bile duct (IPNB) is a rare biliary tumor characterized by papillary growth in the bile duct, a high risk of malignant transformation, and an unknown prognosis. IPNB diagnosis has always been challenging, especially when the tumor is difficult to detect by imaging. Smaller IPNB tumors are difficult to diagnose preoperatively using only noninvasive imag ing examination, and bile duct stones can impact the successful diagnosis of IPNB.

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