Acute Onset Collagenous Colitis with Unique Endoscopic Findings

Figure 2

(a, b) Two long linear ulcers were observed in the transverse colon. Neither edema nor reddening was observed around these ulcers. (c, d) From the descending colon to the rectum, the appearances of the mucosa were normal, and the pool of watery-bloody stool was observed.

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