Small‑bowel obstruction after modified jejunoileal bypass surgery due to gallstone ileus

Letter to editor: gallstone ileus induced by bilioenteric fistula as a true mechanical obstruction,[1] includes 1%–4% of mechanical bowel obstructions[2,3] can occur in any site of small bowel (sb), especially in the terminal ileum. in modified jejunoileal bypass (mjb), first described by iraj fazel in 1982, two points of sb, 15 cm after treitz’ ligament and 45 cm proximal to illeocecal valve, are resected and anastomosed, and the remaining resected bowel is anastomosed to the gallbladder and cecum that acts as a bilioenteric fistula and can lead to gallstone ileus due to an increased risk of gallstone formation after severe weight loss.