Symptomatic Internal Carotid Agenesis in Children

Figure 1

Sagittal view for CT head and neck with arterial phase contrast showed bilateral internal carotid artery (ICA) agenesis as shown by arrows A and B. Arrow C shows collaterals communicating with cerebral circulation that was supplied by an enlarged posterior communicating artery (POCMA) from a basilar artery (BA) and arrow D shows carotid rete mirabile from the external carotid artery.