<![CDATA[Background: Choledochal cysts are relatively rare congenital anomalies of the biliary system but may lead to serious complications if not diagnosed and managed appropriately. Type I cysts are the most common form and generally require complete cyst excision followed by biliary reconstruction. Case: A 3-year-old girl was diagnosed with a type I choledochal cyst at Dr. Sardjito Hospital, Yogyakarta. The anatomy of the biliary system was assessed using intraoperative cholangiography. Based on the intraoperative findings, complete cyst excision was performed while preserving the surrounding anatomical structures, followed by biliary reconstruction using a Roux-en-Y hepaticojejunostomy. Postoperative evaluation showed that the patient remained clinically stable without significant complications. On postoperative day 10, the surgical wound was healing well, and the patient was discharged for outpatient follow-up. Conclusion: Type I choledochal cysts in children require accurate diagnosis and definitive management to prevent long-term complications. Complete cyst excision followed by Roux-en-Y hepaticojejunostomy resulted in a favorable early outcome in this case. Nevertheless, long-term follow-up remains necessary to detect potential complications following biliary reconstruction.]]>
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