A rare case report of gastric cancer complicated by ectopic drainage of the accessory common bile duct into the stomach and corresponding surgical strategies.

BACKGROUND

Double common bile duct (DCBD) is a rare congenital anomaly, with accessory common bile duct (ACBD) ectopic drainage into the stomach being extremely uncommon and rarely linked to gastric cancer.

CASE REPORT: A 48-year-old male with 2-month intermittent retrosternal painand 4-day melena was diagnosed via gastroscopy and pathology. ACBD was intraoperatively misidentified as the accessory left hepatic artery and transected, resulting in bile leakage. He underwent subtotal gastrectomy with Roux-en-Y gastrojejunostomy, D2 lymphadenectomy jejunojejunal end-to-side anastomosis, and choledochojejunostomy, with intraoperative videos, specimen images and pathology reports provided. The reconstructed accessory common bile duct showed unobstructed drainage.

CONCLUSION

This case highlights the importance of accurate ACBD diagnosis and proper surgical management, and summarizes relevant surgical strategies, offering reference for similar cases.