This presentation is but a preliminary report, because at the present time the material is sufficient only for a short presentation.
In my experience dilatation of the duodenum may be divided into the following three groups:
1. Dilatation associated with acute dilatation of the stomach—gastromesenteric ileus. This condition is often met with during the acute stage of. or in the convalescence from, a number of grave conditions, chiefly infections such as typhoid fever, pneumonia, acute inflammatory rheumatism. It is also a very common postoperative complication. The best treatment in this group is with the stomach-tube, but under certain conditions operative relief may become imperative. On this form of dilatation of the duodenum much has been published.1 I have nothing new to add here, except in regard to operative relief.
2. Chronic dilatation of the duodenum. In my first report2 I think I was one of the first to