Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12876-018-0737-7/MediaObjects/12876_2018_737_Fig2_HTML.gif)
a Contrast-enhanced computed tomography showed long segment marked colonic wall thickening extending from the transverse colon to the distal rectum on the first day of hospitalization. b Computed tomography revealed abdominal free air and dilated loops of colon on the 35th hospital day