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Related to posterior cerebral artery: middle cerebral artery, basilar artery, anterior cerebral artery
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In case 1, the large left posterior cerebral artery feeder is less typical.
An intensive blood flow is recorded in posterior cerebral artery and it becomes more intensive under the compression of homolateral MCA.
In this circumstance, the cerebral hemisphere relies for its blood supply exclusively on end-to-end anastomoses between middle, anterior, and posterior cerebral artery cortical branches, which frequently are inadequate to prevent infarction.
The CTA and MRA showed severe stenosis of the proximal segment of the right posterior cerebral artery (PCA) and distal vascular branches reduced [Figure 1]d and [Figure 1]e.
Posterior Cerebral Artery (PCA) is a branch of basilar artery, which are formed by the union of two vertebral arteries.

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