Figure Legends
Fig. 1. The initial CT scan reveals thickening of the wall of the descending colon (arrowhead) and free air around the colon and in the retroperitoneum (arrow). CT, computed tomography.
Fig. 2. The macroscopy of the resected colon reveals multiple linear ulcers called ”mucosal tears ” in CC (arrowhead), and an arrow indicates the perforation. This revealed no diverticulum or tumor in the colon.
CC, collagenous colitis.
Fig. 3. Histopathological examination revealed a thick subepithelial collagen band by HE stains (a, arrows and dotted line). This collagen band is stained blue by Masson trichrome stain (b arrow heads).
HE stains, Hematoxylin and eosin stain