[Duodenal obstruction due to a biliary calculus (Bouveret's syndrome)]. / Obstrucción duodenal por cálculo biliar (síndrome de Bouveret).

We present a case of duodenal obstruction caused by biliary calculus (Bouveret's syndrome) an unusual cause of gallstone ileus. The clinical presentation simulated a pyloric stenosis, the gastrointestinal X-ray study being that which allowed us to establish diagnosis. Surgery was carried out only on the duodenal obstruction with successful results.