Dense middle cerebral aery (MCA) Sign in brain is seen in
High-Yield Explanation
The hyperdense MCA sign refers to the focally increased density of the middle cerebral aery on CT and is a direct visualization of thromboembolic material within the lumen. It is thus the earliest visible sign of MCA infarction as it is seen within 90 minutes after the event - acute infarct. It is the longitudinal equivalent of the MCA dot sign and hyperdense basilar tip sign.