Case

Case

Medical history

A 65-year-old male patient, hospitalized after sudden episode of vertigo, nausea and dysarthria, with rapid evolution to hemiplegia and a decreased level of consciousness in 24 hours. At physical examination, the patient was afebrile with complete bilateral horizontal gaze palsy and dysdiadochokinesia. His medical history shows a longtime smoker and a poorly controlled high blood pressure. To the initial evaluation was request cranial computerized tomography (CT) scan, lumbar puncture and electroencephalogram (EEG).



Question:
Based on clinical history and on examination of the test results, the most likely diagnosis is:

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