What is Hyperdense MCA?
The ‘hyperdense MCA sign’ refers to the appearance of high attenuation of the proximal segment of middle cerebral artery (MCA) that is usually associated with thrombosis of the M1 middle cerebral artery segment and it may be the only early diagnostic sign on computed tomography (CT) after stroke of ischemic nature (2).
What is Hyperdense lesion?
Hyperdense Lesions There are a variety of causes for lesions to be hyperdense (hyperattenuating) on CT scanning. One of the most common causes is hemorrhage, but other etiologies include dense cellularity, mucinous or proteinaceous lesions, and partial or “psammomatous” calcification.
What signs and symptoms are present during a right MCA MCA stroke?
As described previously, MCA strokes typically present with the symptoms individuals associate most commonly with strokes, such as unilateral weakness and/or numbness, facial droop, and speech deficits ranging from mild dysarthria and mild aphasia to global aphasia.
What is Hyperdense cyst?
Conclusions: Hyperdense renal cyst is a simple cyst which has suffered bleeding or infection. Diagnosis is made by CT scan and it does not require treatment.
Which is part of the MCA is hyperdense?
The proximal portion of the MCA, often extending into the terminal supraclinoid internal carotid artery, is hyperdense compared to the other side and to the basilar tip which is often at a similar level. Care must be taken not to overcall this sign on thick axial slices only as different slice position relative to the MCA can lead to asymmetry.
What does hyperdense Sylvian fissure MCA ” Dot ” Sign mean?
Background and Purpose —The hyperdense appearance of the main middle cerebral artery (HMCA) is now a familiar early warning of large cerebral infarction, brain edema, and poor prognosis. This article describes the hyperdensity associated with embolic occlusion of branches of the middle cerebral artery in the sylvian fissure (MCA “dot” sign).
What is the specificity of the MCA sign?
The sensitivity of this CT sign is approximately 30%, while its specificity is high reaching 90% 6. The proximal portion of the MCA, often extending into the terminal supraclinoid internal carotid artery, is hyperdense compared to the other side and to the basilar tip which is often at a similar level.
When to use a positive MCA Dot or hmca?
The HMCA was defined as an MCA denser than its counterpart. Positive MCA dot and HMCA signs were considered appropriate if associated with CT ischemic change on either the baseline or 24-hour CT scan.