Potassium channel antibody-associated encephalopathy: a potentially immunotherapy-responsive form of limbic encephalitis
| Autor: | Angela Vincent, Christian G. Bien, Jackie Palace, Linda Clover, Salah Omer, Camilla Buckley, Jonathan M. Schott, Bonnie‐Kate Dewar, Niels Detert, Ian Baker, Bethan Lang, Martin N. Rossor, Abigail Parkinson |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty Pathology Neuromyotonia Prednisolone Encephalopathy Neuropsychological Tests Gastroenterology Morvan's syndrome Limbic Encephalitis Internal medicine Humans Medicine Glucocorticoids Aged Autoantibodies Retrospective Studies Cerebral atrophy Wernicke–Korsakoff syndrome Plasma Exchange business.industry Limbic encephalitis Brain Middle Aged medicine.disease Magnetic Resonance Imaging Potassium channel complex Potassium Channels Voltage-Gated Amnesia Neurology (clinical) business Encephalitis |
| Popis: | Patients presenting with subacute amnesia are frequently seen in acute neurological practice. Amongst the differential diagnoses, herpes simplex encephalitis, Korsakoff's syndrome and limbic encephalitis should be considered. Limbic encephalitis is typically a paraneoplastic syndrome with a poor prognosis; thus, identifying those patients with potentially reversible symptoms is important. Voltage-gated potassium channel antibodies (VGKC-Ab) have recently been reported in three cases of reversible limbic encephalitis. Here we review the clinical, immunological and neuropsychological features of 10 patients (nine male, one female; age range 44-79 years), eight of whom were identified in two centres over a period of 15 months. The patients presented with 1-52 week histories of memory loss, confusion and seizures. Low plasma sodium concentrations, initially resistant to treatment, were present in eight out of 10. Brain MRI at onset showed signal change in the medial temporal lobes in eight out of 10 cases. Paraneoplastic antibodies were negative, but VGKC-Ab ranged from 450 to 5128 pM (neurological and healthy controls |
| Databáze: | OpenAIRE |
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