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Choledochal cyst and gallbladder duplication are rare congenital anomalies. They typically are surgical problems of infancy or childhood but rarely may present in adults also. Despite high resolution imaging, the differentiation of type II choledochal cyst from gallbladder duplication often causes the diagnostic dilemma; which may result in high risk for intraoperative iatrogenic injury. Operative management of choledochal cyst is the definite treatment because of its malignant potential. A type II choledochal cyst arising from the hepatic hilum presenting as gallbladder duplication on imaging has not been reported earlier in the literature and here we present a case report of the same which was managed successfully., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2021. No commercial re-use. See rights and permissions. Published by BMJ.)