Match the following clinical presentations and initial non-contrast head CT findings with the most likely specific type of intracranial hemorrhage.
- Sudden onset of a 'thunderclap' headache, nuchal rigidity, and photophobia; neuroimaging demonstrates hyperdensity extending into the basal cisterns and sylvian fissure.Subarachnoid hemorrhage
- Brief loss of consciousness following temporal head trauma, a subsequent lucid interval, and rapid neurologic deterioration; neuroimaging demonstrates a biconvex hyperdensity constrained by cranial sutures.Epidural hematoma
- Insidious onset of cognitive decline, fluctuating mental status, and gait instability over weeks following mild trauma in an elderly patient; neuroimaging demonstrates a crescent-shaped hypodensity.Chronic subdural hematoma
- Sudden onset of severe focal neurologic deficits, including dense hemiparesis, in a patient with medication nonadherence; neuroimaging demonstrates a hyperdensity localized to the putamen.Hypertensive intraparenchymal hemorrhage
Answer
1 -> Subarachnoid hemorrhage, 2 -> Epidural hematoma, 3 -> Chronic subdural hematoma, 4 -> Hypertensive intraparenchymal hemorrhage
Intracranial hemorrhages are categorized by anatomical space and etiology. Subarachnoid hemorrhage fills the cisterns and causes meningeal irritation. Epidural hematoma (arterial origin) forms a high-pressure biconvex collection with a lucid interval. Chronic subdural hematoma (venous origin) forms a low-pressure crescentic hypodensity over weeks. Hypertensive hemorrhage classically strikes deep brain structures like the putamen.
Step-by-Step Solution
Key Concept
Different types of intracranial hemorrhages present with characteristic timing (hyperacute vs. subacute), associated risk factors (trauma, aneurysms, hypertension), and specific morphologic patterns on non-contrast head CT.