Autoimmune encephalopathy presenting as a ‘posterior circulation stroke’
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Antibodies to voltage gated potassium channels (VGKC) can result in a reversible form of encephalopathy . Since first described, the clinical phenotype of patients with antibodies to VGKC continues to expand . To our knowledge this is the first reported case of VGKC encephalopathy mimicking a stroke resulting in misdiagnosis.
A 73 year old woman presented with aphasia and right upper limb weakness, 5 days post-carotid endarterectomy for an asymptomatic 90% left carotid stenosis. She had experienced atrial fibrillation (warfarin had not yet been reintroduced), hypertension, diabetes and was an ex-smoker.
KeywordsApparent Diffusion Coefficient Mycophenolate Mofetil Carotid Stenosis Posterior Cerebral Artery Limbic Encephalitis