Code Stroke
CT findings in acute stroke.pdf
Hyperdense MCA Sign / MCA Dot Sign
The hyperdense MCA sign refers to focal hyperdensity of the MCA on non-contrast brain CT and is the direct visualization of thromboembolic material within the lumen.
The MCA dot sign is an early marker of thromboembolic occlusion of the distal MCA branches seen in the Sylvian fissure (M2 segment). The principally affected area of the brain is the insula.
Radiopaedia
Hyperdense Basilar Artery
Top of the basilar syndrome, also known as rostral brainstem infarction, is a condition where the top portion of the basilar artery becomes blocked by a blood clot, leading to reduced blood flow. This blockage causes ischemia, or lack of blood supply, to both thalamic regions in the brain due to the occlusion of small blood vessels known as perforators.
Top of the basilar occlusion is typically caused by an embolus, a blood clot that travels from another location and gets lodged in the artery. On the other hand, mid-basilar occlusion is often caused by the formation of a blood clot directly within the basilar artery due to complications from atherosclerosis.
In computed tomography (CT) scans, it is important to identify a hyperdense basilar artery, which appears brighter than the surrounding structures. This finding is crucial for diagnosing acute basilar artery occlusion.
Stroke etiology by @teachplaygrub.pdfCarotid Plaque by @teachplaygrub .pdfFetal Origin by @aaronrutman .pdf