We present a 72-year-old female patient complaining of pain and distention of the abdomen, nausea and vomiting. No history of previous abdominal surgery, hernias or biliary disease was present. Plain abdominal x-rays showed small bowel obstruction. This mechanical obstruction of the gastrointestinal truct was caused by a gallstone in the terminal ileum.
 R. Hermosa, C. Cazador, G. Vila, R. Garo, F. Francesch and A. Fernandez, “Gallstone Ileus: Results of Analysis of a Series of 40 Patients,” Gastroenterology and Hepatology, Vol. 24, No. 10, 2001, pp. 489-494.
 W. Hempfling, C. Rust, M. Sackmann, G. U. Muller, H. Arbogast and B. Goke, “Case Report,” Medizinische Klinik, Vol. 96, No. 12, 2001, pp. 735-739. http://dx.doi.org/10.1007/PL00002170
 R. Grassi, A. Pinto, E. Rossi, G. Rossi, M. Scaglione and F. Lassandro, “9 Consecutive Patients with Gallstone Ileus. Personal Experience,” Radiologia Medica (Torino), Vol. 95, No. 3, 1998, pp. 177-181.
 P. A. Clavien, J. Richon, S. Burgan and A. Rohner, “Gallstone Ileus,” British Journal of Surgery, Vol. 77, No. 7, 1990, pp. 737-742. http://dx.doi.org/10.1002/bjs.1800770707
 L. G. Rigler, C. N. Borman and J. F. Noble, “Gallstone Obstruction: Pathogenesis and Roentgen Manifestations,” The Journal of the American Medical Association, Vol. 117, No. 21, 1941, pp. 1753-1759. http://dx.doi.org/10.1001/jama.1941.02820470001001
 Y. Kasahara, H. Umemura, S. Shiraha, T. Kuyama, K. Sakata and H. Kubota, ?Gallstone Ileus: Review of 112 Patients in the Japanese Literature,” The American Journal of Surgery, Vol. 140, No. 3, 1980, pp. 437-440.