A case of congenital absence of the left internal carotid artery.

A case of congenital absence of the internal carotid artery was presented in a 37-year-old male with temporal lobe epilepsy. A dilated vascular channel, which is one of the characteristics associated with the congenital absence of the internal carotid artery, can be demonstrated in the conventional contrast-enhanced CT scans. Absence of the carotid canal can be delineated far more clearly in the CT scans of the skull base.