BackgroundThis retrospective study addressed the challenge of postoperative biliary fistula, a common complication observed after surgical management of giant hepatic hydatid cysts. The primary objective was to compare the efficacy and safety of conservative surgical techniques versus prophylactic Roux-en-Y cystojejunostomy (R-en-Y CJ) in addressing residual cavity. MethodsRetrospective analysis was conducted on patients who underwent surgical intervention for giant hepatic hydatid cysts with cysto-biliary communication from July 2021 to Jan 2024. Preoperative laboratory tests, imaging studies, surgical procedures, and postoperative outcomes were reviewed from medical records. Results32 patients who underwent surgery for giant hepatic hydatid cysts were included. There were 19 (59.38%) female patients, with a mean age of cohort was 39.13 years. The patients were divided into two groups with respect to the treatment modality: Group A (n = 14), treated with conservative surgical techniques and R-en-Y CJ, and Group B (n = 18), treated with conservative surgical methods. The overall cavity-related complications occurred in 9/18 (50%) in Group B, whereas 2/14 patients (14.29%) in Group A during the follow-up period (p < 0.05). ConclusionR-en-Y CJ is an effective and safe surgical procedure for tackling residual cavities in giant hepatic hydatid cysts with cysto-biliary communication.