During dissection of the abdomen the descending cotonwas found to be displaced medially with a persistentmesocolon still present. In the lateral recess created bythis abnormal position were found coils of ileum andjejunum. The ascending colon although not displacedalso contained a persistent mesocolon, althoughsomewhat shorter in length. Throughout its length thedescending colon was only 2.5 cm. in width, however,upon pathological examination was found to benormal.