Gallstone ileus is obstruction of the bowel due to impaction of one of more gallstones. It represents 4% of causes of bowel obstruction in the general population and 25% of obstruction occurring in the elderly.1 To cause an obstruction, stones usually have to be at least 2.5 cm in diameter.
This is a companion discussion topic for the original article at https://patient.info/doctor/gallstone-ileus