PMC6239025_01
Dehiscence of the right internal carotid artery at the level of the
eustachian tube on noncontrast computed tomography (CT) of the right
temporal bone. (A) Axial CT images of the right temporal bone demonstrating
dehiscence of the internal carotid artery (ICA) (arrows) at the level of the
eustachian tube (ET). (B) Coronal CT images of the right temporal bone
demonstrating dehiscence of the ICA (arrows) at the level of the ET.
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PMC6239025_01_10.1177_2473974X17753605-fig1.jpg
fig1-2473974X17753605
This examination revealed a large dehiscence of the petrous segment of the ICA anteriorly to the cochlea, just at the level of the medial wall of the eustachian tube (ET) on the right side ( Figure 1 ).