<unk>  is a rare form of small bowel obstruction caused by an impaction of a<unk>  within the lumen of the small intestine. Such a<unk>  enters the bowel via a cholecysto-enteric fistula. The presence of large stones, >2.5 cm in diameter, within the gallbladder are thought to predispose to fistula formation by gradual erosion through the gallbladder fundus. Once a fistula has formed, a stone may travel from the gallbladder into the bowel and become lodged almost anywhere along the gastrointestinal tract. Obstruction occurs most commonly at the near the distal<unk> , within 60 cm proximally to the ileocecal valve. Rarely,<unk>  may recur if the underlying fistula is not treated. First described by Thomas Bartholin in 1654, the name<unk> " is a misnomer because an<unk>  is, by definition, a non-mechanical bowel motility failure (as opposed to a mechanical obstruction by a stone).
Gallstone ileus
Acute pancreatitis
Chronic pancreatitis
Ascending cholangitis
Biliary colic
Pancreatic abscess
Biliary fistula
Spontaneous bacterial peritonitis