Match each distinct pathognomonic neuroimaging finding on computed tomography (CT) or magnetic resonance imaging (MRI) with its corresponding acute neurologic condition.
- Lentiform (biconvex) hyperdense collection strictly bounded by cranial suture lines on non-contrast head CTEpidural hematoma
- Crescent-shaped hyperdense collection that crosses cranial suture lines but is limited by dural reflections on non-contrast head CTSubdural hematoma
- Hyperdense appearance of the middle cerebral artery (MCA) combined with loss of the insular ribbon on non-contrast head CTAcute ischemic stroke
- Central hypodensity surrounded by contrast enhancement within the superior sagittal sinus ('empty delta sign') on contrast-enhanced CT or MR venographyCerebral venous sinus thrombosis
Cevap
The correct matches pair specific neuroimaging signs with their diagnostic pathologies: lentiform hyperdensity with epidural hematoma, crescent-shaped hyperdensity with subdural hematoma, hyperdense MCA sign with acute ischemic stroke, and empty delta sign with cerebral venous sinus thrombosis.
Each imaging sign is highly specific for its respective acute neurologic condition based on the anatomical compartments involved, the source of bleeding or thrombus, and the physiological tissue response to ischemia.
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Anahtar Kavram
Interpreting pathognomonic neuroimaging findings for acute neurological emergencies