Dense middle cerebral aery (MCA) Sign in brain is seen in
Acute infarct
Subacute infarct
Subacute haemorrhage
Chronic infarct
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.
Nervous system