Traumatic chiasmal syndrome: a feature photograph.

Traumatic chiasmal neuropathy results from injury to the face, sphenoid and clivus. Its pathogenesis remains enigmatic. Because of its close relationship to the pituitary gland, hypothalamus and internal carotid artery, a neuro-ophthalmic evaluation and imaging is needed in such cases. We present a patient who developed traumatic chiasmal syndrome after an automobile accident. Computed tomographic scan showed fracture of the sella turcica. A carotid angiography showed a traumatic pseudoaneurysm of the internal carotid at the base of the skull.