In the context of head CT, 'Hyperdense MCA sign' indicates:Question 30Select one:a.Brain tumorb.Hemorrhagic strokec.Meningitisd.Ischemic stroke

Break Down the Problem

1. Identify what the "Hyperdense MCA sign" refers to in neuroimaging.
2. Analyze each of the provided options in relation to the hyperdense sign observed in a head CT scan.

Relevant Concepts

• Hyperdense MCA sign: This term typically refers to an indication of an increased density in the middle cerebral artery (MCA) on a CT scan, which is often indicative of a condition related to increased blood density due to hemorrhage or thrombosis.

Analysis and Detail

1. Brain tumor: While brain tumors can sometimes present with hyperdensity, the specific "hyperdense MCA sign" is not typically associated with tumors.
2. Hemorrhagic stroke: The hyperdense appearance in the MCA is strongly associated with a hemorrhagic stroke because it suggests the presence of blood in the vessel or areas surrounding it.
3. Meningitis: This condition does not usually cause hyperdensity in the MCA; it is related to inflammation of the meninges.
4. Ischemic stroke: Ischemic strokes result from occlusion but do not typically present with significant hyperdensity in the MCA.

Verify and Summarize

Based on the analyses, the hyperdense MCA sign is most directly related to a hemorrhagic stroke, as it indicates the presence of blood, which is consistent with the definition of hemorrhagic events in the context of CT imaging.

Final Answer

b. Hemorrhagic stroke