Abstract
Autoimmune encephalitis is one of the main causes of noninfectious encephalitis. Can be broadly classied into non-paraneoplastic, paraneoplastic and vasculitis associated encephalopathy. It can be triggered by tumors and infections. Autoimmune encephalitis presents with variety of clinical features such as acute onset behavioral changes, psychiatric symptoms, memory loss, movement disorders, dystonia, mutism and seizures. Neuronal antibodies are directed against cell surface Ag(CSAab) ,synaptic antigen (SyAab), intraneuronal Ag(INAab). Anti LG1 and CASPR2 encephalitis are usually non-neoplastic autoimmune encephalopathy where antibodies are directed against proteins associated with Voltage gated k channel. About 50% patients with anti-VGKC encephalitis do not present antibodies against LGI1 or CASPR-2. Anually 1 case is detected amongst 100000 patients. This is a case report of a patient presented to Geriatrics OPD and the series of evaluation which led to diagnosis and treatment outcome.
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