Active gastrointestinal diverticulum bleeding diagnosed by computed tomography angiography

Figure 2 Imaging of case 2. A: Abdominal computed tomography (CT) revealed contrast extravasation in the ascending colon (arrow); B: CT angiography revealed bleeding from the intramural branches of the marginal artery supplying the ascending colon (arrow); C: Angiography failed to reveal the precise location of the bleeding; D: Emergent colonoscopy revealed multiple diverticula in the middle part of the ascending colon without definite bleeding vessels identified (arrow).