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Copyright of Polish Journal of Surgery is the property of Fundacja Polski Przedglad Chirurgiczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Choledochal cysts are congenital anomalies that can occur at any level of the biliary tree. They carry long-term risk of biliary complications and cancer development. Complete excision of all involved bile ducts is recommended.Methods: Patients treated between 1995 and 2019 were reviewed retrospectively.Results: Sixty patients; 46 female and 14 male with a median age of 41 years (range 13-83) were included in the study. Mild abdominal pain was the most common presenting symptom (60%). Majority of the patients had Todani type I cysts (67%). Concomitant biliary malignancy was diagnosed in five patients (9%). Eight patients were followed-up conservatively (13%). Twenty-five patients were treated by excision of the extrahepatic bile ducts and Roux-en-Y hepaticojejunostomy, liver resection was added in seven, pancreatoduodenectomy was done in three and liver transplantation in one. There was no perioperative mortality. Postoperative complications developed in 17 patients (34%), two requiring surgical treatment. Four of the five patients with malignancies died at a median 42 months (range 6-95) following surgery. Median 62 months (range 8-280) follow-up was available in 45 surgically treated patients, 19 followed-up for more than 10 years. None of the patients developed malignancy during follow-up. Four patients (17%) were readmitted for anastomotic strictures requiring treatment.Conclusion: The majority of choledochal cysts are Todani type-I and early cyst excision is the mainstay of management, which may decrease the risk of malignant transformation. [ABSTRACT FROM AUTHOR]