Colonoscopy-induced ischemic colitis in patients without risk factors

Figure 1 Case 1 findings. A: Initial colonoscopic findings, Normal colonoscopic findings in ascending colon; B, C Follow up colonoscopic findings; B: The results showed severe petechial hemorrhages with edematous mucosal inflammation in the ascending colon; C: The results showed longitudinal ulcers and hemorrhages in the ascending colon; D: Microscopic findings of affected ascending colon (H and E stain, × 100). Biopsy was compatible with the findings of ischemic colitis, showing erosions and hemorrhages; E: Abdominal computed tomography findings, the results shows diffuse wall thickening of the ascending colon and fluid collection around the ascending colon; F: Follow up colonoscopic findings in 6 mo, the results showed totally normal colonoscopic findings in the ascending colon.

Figure 2 Case 2 findings. A: The results showed diffuse edematous mucosal inflammations, submucosal hemorrhages, erosions, ulcers and friability; B: The results showed longitudinal ulcers and hemorrhages; C, D: Abdominal computed tomography findings. The results shows submucosal edematous changes and decreased enhancement of thickened colonic wall from the ascending colon to the distal transverse colon.