Gallstone ileus: An unusual complication of cholelithiasis in a 42-year-old female with no comorbidities

Gallstone ileus is a rare condition, accounting for 0.5 % of mechanical small bowel obstructions. It is a misnomer for mechanical intestinal obstruction caused by one or more gallstones impacted within the gastrointestinal tract lumen, which occurs mostly in the elderly and female population. Treated usually by operative enterolithotomy. Preoperative diagnosis is challenging, but CT, which is investigation of choice, and magnetic resonance imaging (MRI) have made it easier to diagnose.