Cerebrovascular Disease USMLE Step 1 Practice Question
A 19-year-old male presents to the emergency department following blunt head trauma from a motor vehicle collision 90 minutes ago. Initially he was alert and oriented with a brief loss of consciousness that resolved within seconds. He now complains of a severe frontal headache and appears increasingly lethargic. His pupils remain equal and reactive bilaterally. Vital signs: BP 145/92 mmHg, HR 68 bpm, RR 16/min, temperature 37.2°C. Non-contrast CT head shows a lens-shaped (biconvex) hyperdense collection overlying the right frontal convexity, with mass effect on the adjacent brain. Which of the following vessels is most likely responsible for this hemorrhage?
Answer choices
- AMiddle meningeal arteryCorrect answer
- BSuperior sagittal sinus
- CAnterior cerebral artery
- DBridging veins crossing the subdural space
- EPosterior inferior cerebellar artery
- FVertebral artery
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