A COMMUNICATING INTESTINAL DUPLICATION IN A SPRAGUE-DAWLEY RAT

Duplications of the gastrointestinal tract are exceedingly rare in lab oratory animals. We report a case of a communicating intestinal duplic ation in a 17-wk-old Sprague-Dawley (SD) rat. The duplication was pres ent in the mesenteric border of the ileum, and both proximal and dista l ends were communicated with the lumen of ileum. Histologically, the duplicated portion had a thick muscle wall and a mucosa similar to tha t of the small intestine. This is the first reported case of intestina l duplication in an SD rat.