PMC7196992_01
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.
CRIPE2020-3290460.001.jpg
PMC7196992_01_CRIPE2020-3290460.001.jpg
fig1
Multiple collaterals were seen communicating with the anterior cerebral circulation that was supplied by an enlarged posterior communicating artery (POCMA) from a basilar artery (BA) and carotid rete mirabile from the external carotid artery (Figures 1 and 2).
Skull base bone view with arrow showing obliteration for petrous bone carotid canal in the 6-year-old patient with bilateral ICA agenesis.
CRIPE2020-3290460.002.jpg
PMC7196992_01_CRIPE2020-3290460.002.jpg
fig2
Multiple collaterals were seen communicating with the anterior cerebral circulation that was supplied by an enlarged posterior communicating artery (POCMA) from a basilar artery (BA) and carotid rete mirabile from the external carotid artery (Figures 1 and 2).