RESUMO
INTRODUCTION AND IMPORTANCE: Biliary cysts are rare congenital anomalies of the biliary ductal system. Cystic duct cysts in particular are not included in the widely used Todani classification and remain underreported. CASE PRESENTATION: A 28-year-old male presented with intermittent right upper quadrant pain exacerbated by fatty foods. Ultrasound showed a septate gallbladder. Laboratory tests were normal. Laparoscopic cholecystectomy identified a 1.5 cm cystic duct cyst. CLINICAL DISCUSSION: Cystic duct cysts arise from anomalous ductal recanalization/dilatation. Presentation mimics cholelithiasis. Complete surgical excision is the treatment to prevent complications. CONCLUSION: This case presents an incidental finding of a cystic duct cyst resected during cholecystectomy for septate gallbladder. Increased recognition can improve the management of these rare biliary anomalies.
