Cerebrovascular Disease USMLE Step 1 Practice Question
A 70-year-old man with hypertension presents with sudden-onset left arm and leg weakness and loss of left-sided proprioception. Vital signs: BP 168/95 mmHg, HR 88/min, RR 16/min, temp 37.2°C, SpO2 98% on room air. On examination, his tongue deviates rightward upon protrusion. Brain MRI shows acute restricted diffusion in the right midbrain. Cranial nerves II-XII are otherwise intact. Which vascular territory is most likely affected?
Answer choices
- ARight middle cerebral artery infarct
- BBasilar artery thrombosis
- CLeft anterior inferior cerebellar artery infarct
- DRight posterior inferior cerebellar artery infarct
- ERight anterior spinal artery infarct affecting the medial medullaCorrect answer
- FRight superior cerebellar artery infarct
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