Figure 4.

(a) A 30-cm small intestine segmental resection specimen showing a number of diverticula in the mesentery, a 5-cm mass with an abscess and bleeding, and an abscess in the mesentery on the oral side of the mass. The white lines marked with letters correspond to the slices shown in Fig. 4b. (b) Cross-sectional specimens showing scattered hard white nodules and abscess cavities. The two regions of inflammation are independent of each other, with no connections. The yellow triangle, square, and star correspond to Fig. 4c–e, respectively. (c) Microscopic image (hematoxylin–eosin staining, original magnification: ×4) showing the interrupted mucous membrane (arrow) and a collection of inflammatory cells, with bleeding in the surrounding area. (d) Microscopic image (hematoxylin–eosin staining, original magnification: ×4) showing the interrupted muscular layer (arrows). This diverticulum was a false diverticulum. (e) Microscopic image (hematoxylin–eosin staining, original magnification: ×4) showing the interrupted mucous membrane (arrow) and a collection of inflammatory cells, with bleeding in the surrounding area.