Figure 5.

Intervention. (a) Coiling of left colic artery branches (arrows) prior to Onyx injection into the left colic artery (arrowhead) in order to prevent Onyx progression into the marginal artery. (b) Onyx embolization of the superior rectal artery (short arrow). Minimal filling of nontarget branches is also displayed (arrowhead). Onyx glue is seen through the AVM in the outflow vein of the left colic and superior rectal niduses. Inadvertent dissection of the IMA is demonstrated with stagnant contrast present in the IMA (long arrow). (c) Coils were deployed in two branches of the sigmoid artery to prevent Onyx filling of the marginal artery (arrows).