Fig 1.

Procedural angiograms: catheterization of the MMA. A, Common carotid angiogram, lateral view, shows both the OA arising from the ICA and the MMA arising from the external carotid artery. The microcatheter was first placed into the OA, but because of its small size, there was stagnation of contrast (flow arrest). Therefore, the decision was made to treat via the MMA. B, Preliminary lateral angiogram showing the vascular anatomy of the MMA and its orbital branch. C, Lateral angiogram showing excellent choroidal crescent (arrow without label) and reflux into the OA after radiopaque contrast injection via the orbital branch of the MMA.