Duodenocaval fistula is a type of digestive fistula rarely described in the literature. It usually manifests by sepsis associated with gastrointestinal bleeding. The treatment is surgical and the prognosis usually not favorable. We describe the case of a woman admitted to our hospital with sepsis, having been diagnosed with a duodenocaval fistula secondary to perforation of the digestive tract by a foreign body. Surprisingly, the fistula sealed by itself, without the need of surgery, and with a favorable evolution.