[The perforation of the small intestine into the free peritoneum revealing Crohn disease].

A new case of Crohn's disease was discovered due to a perforation of the small bowel into the free peritoneum. We recall the epidemiological, clinical and pathogenic features of this rare incident. On the basis of the data in the literature, we propose a discussion of the surgical techniques used. Resection appears to be preferred Anastomosis is usually performed later except in exceptional selected cases.