Blindness due to aneurysm of anterior communicating artery. With recovery following carotid ligation.

Aneurysms of the anterior communicating artery are an uncommon cause of visual, olfactory, mental, endocrine, and sphincteric disturbance. In this paper is presented a patient with a giant anterior communicating aneurysm, causing headache, severe constriction of visual fields, and diminution of visual acuity. Transient diabetes insipidus, mental change, and urinary retention were also noted. Improvement occurred after ligation of the right common carotid artery.