[Internal hernia in the duodenal fossae. 3 cases].

Para-duodenal strangulated hernia is an unusual operative finding. The entraped position of intestinal loops in a vascularized pouch allow to recognize the lesion, the site of the neck of the hernia point out its anatomic form. Pre-operative diagnosis seems difficult to access in spite of numerous investigation'means. The strangulation is generally few tight, so the treatment is very easy outside of a carefully dissection of the neck of the left para-duodenal hernias.