Fig. 3

Histopathological findings. a The inner wall of the cyst was lined with colonic mucosa, and it shared a muscle layer (arrows) with the original enteric wall. b The muscular layer (arrows) was separated into two layers at the edges of the cyst. c A vestige of the opening site in the cyst wall: a discontinuity (white arrows) of the cyst’s muscle layer (black arrows) was observed at the top of the cyst near the transitional point (arrowhead) between the ileum and colonic mucosa