Fig. 2

A 58-year-old man with ascending colonic hemorrhage due to colonic diverticulosis. Ultraselective TAE was performed after hemostatic clipping via colonoscopy was unsuccessful. a Superior mesenteric angiography image showed the vasa recta (black arrowhead) with near clipping (black arrow); however, contrast extravasation could not be identified. b Angiography through the ileocolic artery (white arrow) with a 1.7-F microcatheter (Veloute; Asahi Intecc) showed a small and considerably bent vasa recta (black arrowhead) and contrast extravasation (black arrow). After identifying the bleeding site, a 1.7-F microcatheter was inserted into the bleeding vasa recta (not shown). c Selective angiography through the vasa recta showed a short branch (white arrowhead) and contrast extravasation (black arrow) from the long branch (black arrowhead). d Two microcoils (Target Nano Coils; Stryker) of 1 mm in diameter and 2 cm long (white arrowhead) placed at the site of contrast extravasation and the bleeding branch. After ultraselective TAE, angiography through the ileocolic artery showed disappearance of extravasations, occlusion of the long branch and maintenance of the short branch (black arrowhead)