PMC5968264_01
Multidetector-row computed tomography scan clearly showing active contrast extravasation in the lower rectum (arrow).
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F1
To identify the site of bleeding, prompt MDCT was performed, and the scan clearly showed active contrast extravasation in the lower rectum (Fig. 1).
Photograph showing the exposed blood vessel in the lower rectum during colonoscopy.
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F2
Subsequently, urgent colonoscopy was performed with bowel preparation, and pulsatile, fresh bleeding from the exposed nipple-like vessel was observed without mucosal defect or ulceration in the lower rectum (Fig. 2).