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Lateral medullary infarction — RCPSC IM MCQ

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HardNeurologyLateral medullary infarctionRCPSC IM

A 72-year-old man develops sudden vertigo, vomiting, dysarthria, left facial numbness, right body pain-temperature loss, and ipsilateral limb ataxia. CT head is normal initially. He has atrial fibrillation and is not anticoagulated. What is the most likely diagnosis?

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Correct answer: D — Lateral medullary infarction

Crossed sensory findings, dysarthria, vertigo, vomiting, and ipsilateral ataxia localize to the lateral medulla, usually from posterior circulation ischemia.

Reference: Canadian Stroke Best Practices