Peters H, Schubert H J
MMW Munch Med Wochenschr. 1976 Nov 19;118(47):1521-4.
Gallstone ileus may complicate biliary disease in 0.3 to 4.0%. The incidence of mechanical obstruction of the small intestine due to gallstones is between 0.1 and 7.7%. This being an illness of the elderly patient, the prognosis is most unfavorable. The mortality lies between 10 and 50%. Further lowering of the mortality rate is only possible by early surgery.