Duodenal membranes: a late diagnosis evidenced by foreign bodies.

One of the causes of congenital incomplete duodenal obstruction is the presence of duodenal membranes. This condition requires a high index of suspicion for an early and accurate diagnosis. We present two cases of duodenal obstruction with initial diagnosis of foreign bodies that were surgically intervened and where incomplete duodenal membranes were an incidental finding. The clinical course of these patients had a different pattern than expected and thus, it is imperative to use a multidisciplinary approach in this group of patients and separate them from other subtypes of duodenal obstruction.