File:Acute ICA ischemic penumbra due to high-grade CCA stenosis (CT perfusion) (Radiopaedia 72038-82530 Axial C+ arterial phase 10).jpg

Summary:

• Radiopaedia case ID: 72038
• Image ID: 51710259
• Image stack position: 10/85
• Plane projection: Axial
• Aux modality: C+ arterial phase
• Study description: CT angiogram
• Study findings: No intracranial vascular occlusion identified. High-grade stenosis due to calcified and noncalcified plaque of the dominant right V4. The nondominant left vertebral artery terminates as a PICA. Heavily calcified right vertebral artery, bilateral cavernous ICAs and right terminal ICA. The right common carotid artery bifurcation demonstrates irregular calcified and noncalcified plaque which extends into the proximal ICA causing a high-grade ICA stenosis. Surgical clips anterior to the left carotid sheath. Dural venous sinuses enhance normally.
• Modality: CT
• System: Interventional
• Findings: Hypodense gliosis in the right ACA territory in keeping with prior infarct. Similar post-ischemic gliosis in the left temporal lobe. No new area of grey-white matter differentiation loss. No insular ribbon sign. No dense vessel sign evident on the thin data set. No hemorrhage, surface collection, mass effect or midline shift. Ex vacuo dilatation of the right lateral ventricle. Prominent CSF in the right CP angle with mild mass effect on the right cerebellar hemisphere is an arachnoid cyst which is stable.
• Published: 5th Nov 2019
• Source: https://radiopaedia.org/cases/acute-ica-ischaemic-penumbra-due-to-high-grade-cca-stenosis-ct-perfusion
• Author: Craig Hacking
• Permission: http://creativecommons.org/licenses/by-nc-sa/3.0/

Licensing:

Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)