PMC7691571_01
An irregular stenosis was found in the left internal carotid artery (red arrow) with dissecting aneurysm (green arrow). However, there is no clear abnormality on the right internal carotid artery.
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F1
The CT angiogram (CTA) of the head performed in the local hospital on August 3 revealed severe stenosis of the left ICA, with the possibility of dissection (Figure 1).
The irregular stenosis of the bilateral internal carotid artery (red arrow) with dissecting aneurysm (green arrow).
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F2
The CTA in our hospital on August 15 revealed a bilateral internal carotid dissection artery aneurysm (Figure 2).
The TTP and MTT in the right cerebral hemisphere were slightly prolonged, whereas the CBF and CBV were normal.
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F3
In addition, the CT perfusion (CTP) imaging revealed that the transit time to the peak (TTP) and mean transit time (MTT) of the right cerebral hemisphere were prolonged, whereas the cerebral blood flow (CBF) and cerebral blood volume (CBV) were basically normal (Figure 3).
The DSA revealed that the bilateral internal carotid artery was severely narrow with dissecting aneurysm [orange arrow, (a,c)]. A smooth blood flow after the operation [orange arrow, (b,d)].
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F4
The digital subtraction angiography (DSA) revealed that the bilateral ICA was severely narrow with dissecting aneurysm (Figure 4).