The management of carotid-cavernous arteriovenous aneurysm has received extensive discussion in the literature.1 Various methods of treatment which have been used, some with greater success than others, are as follows: (1) ligation of the internal carotid artery or of the internal carotid artery and the common carotid artery on the affected side; (2) preliminary ligation of the internal carotid artery followed by intracranial ligation of the same artery;2 (3) ligation of the veins in the orbit; (4) a direct attack on the apex of the orbit; (5) plugging of the fistula in the artery with muscle introduced into the blood stream of the internal carotid artery,3 and (6) injection of various substances with a view to helping clotting and eventual closure of the fistula in the affected artery and in other arteries. Treatment of this condition by ligation of the affected internal carotid artery has been found