Conclusion
Extrahepatic biliary cystadenoma is an extremely rare slow-growing tumor that arises predominantly in female and has malignant potential. It presents with vague clinical symptoms and clinicians should aware of it as a differential of gastric outlet obstruction. Moreover they might face a diagnostic dilemma when radiological investigations cannot suggest the accurate organ of origin, which can lead to confusion regarding the treatment to be followed. Hence careful intraoperative evaluation is required before commencing with the procedure. Complete surgical resection remains the treatment of choice to prevent both recurrence and malignant transformation.
Conflicts of interest: None declared.
Financial support: Nil.
Declaration of patient consent: Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal on request.