A rare case of gastrobiliary fistula and gallbladder stones secondary to gastric foreign body: a case report.

Gastrobiliary fistula represents a rare and serious complication arising from various etiologies, including gallbladder calculi, peptic ulcer disease, neoplasms, and foreign bodies. Incidents of gastrobiliary fistula secondary to gastric foreign bodies are exceedingly uncommon. This report details the case of a 79-year-old woman who presented with intermittent upper abdominal pain persisting for over 10 months, with exacerbation noted in the preceding 3 days. Radiological evaluation revealed cholelithiasis with gas accumulation within the gallbladder, alongside linear hyperdense shadows suggestive of a potential gastrobiliary fistula. Intraoperative findings confirmed the presence of the fistula. The patient underwent successful cholecystectomy and fistula repair, resulting in an uneventful postoperative recovery and discharge. Given the rarity of gastrobiliary fistula, it is imperative that surgeons maintain a high index of suspicion and conduct thorough intraoperative exploration when preoperative imaging indicates possible fistulous communication. Importantly, the presence of a gastrobiliary fistula does not constitute a contraindication to laparoscopic surgical intervention.