What is Autoimmune Encephalitis (AE)?

Autoimmune encephalitis (AE) refers to a heterogeneous group of immune-mediated inflammatory diseases primarily affecting the brain, but with the potential involvement of multiple areas of the spinal cord, peripheral nervous system, and systemic symptoms. In several studies, AE has been found to be as common as infectious causes of encephalitis across all age groups. Two Large neuroglial autoantibodies (NAAs) have been identified; these target intracellular neuronal, extracellular/synaptic, or glial antigens and possess different epidemiological and clinical characteristics. Unlike autoantibodies that target intracellular antigens, which are commonly paraneoplastic and appear to mediate T-cell inflammation, there is evidence from disease models that autoantibodies targeting extracellular antigens are pathogenic.

What are the symptoms of autoimmune encephalitis?

Symptoms of autoimmune encephalitis can range widely depending on the patient and the underlying aetiology of the illness. Common presentations include:

• Psychiatric symptoms: These have the potential to substantially impact the patient's mental state, ranging from anxiety to sadness and psychosis.
• Seizures: It may be localized or generalized, further complicate the situation.
• Unusual motions: The daily routine of patients can be easily disturbed due to stiffness, chorea, and tremors.
• Cognitive dysfunction: The person is not allowed to function by himself due to loss of memory and difficulty concentrating. It also happens frequently.
• Autonomic disturbance: Changes in blood pressure along with heart rate might make this clinical picture further complex.
• Disturbances related to sleep: Patients experience disturbance of quality life with frequent incidences of both insomnia and hypersomnia.
• Sleep disturbances: The quality of life of the patient is further disturbed by the frequent occurrence of insomnia and hypersomnia.

This sometimes presents as an autoimmune encephalitis-specific clinical condition, for example, limbic encephalitis. The defining characteristic of this illness is inflammation within the limbic system, resulting in severe amnesia and psychopathology.

Who gets autoimmune encephalitis?

Autoimmune encephalitis was once considered a rare disease, but as doctors become more skilled in its diagnosis, it is becoming increasingly common. A survey found 13.7 cases per 100,000 people.

Risk factors that contribute to the likelihood of developing this disease include:

• Gender: Women are more likely than men to develop this disease, just like many other autoimmune diseases.
• Age: It can be diagnosed at any age, but it is most commonly diagnosed in young women.
• Family history: There is no evidence that it is hereditary.
• Race/ethnicity: A study indicates that it may be much more common among black people, but this needs further research.

Why does autoimmune encephalitis occur?

The cause of autoimmune encephalitis is often unknown. However, experts claim that it can be caused by the following factors:

• Exposure to certain bacteria and viruses, such as herpes simplex virus and streptococcus.
• An ovarian tumour referred to as a teratoma, stimulates the immune system to produce particular antibodies.
• In rare instances, some malignancies can even provoke an autoimmune reaction, wherein the immune system starts attacking the body's own tissues.

How is autoimmune encephalitis diagnosed?

The condition is not very easy to diagnose as its symptoms are somewhat vague and may exhibit those of other diseases, such as infectious encephalitis or mental illnesses.

For diagnosis, conclusive results are mostly achieved through a combination of imaging examinations, laboratory tests, and the clinical assessment. These tests include:

• CSF (Cerebrospinal fluid) analysis: Auto antibodies play a vital role in the diagnosis of autoimmune encephalitis, and this test helps detect it.
• Computed tomography scans and magnetic resonance imaging: These are two imaging tests applied to detect characteristic changes associated with autoimmune encephalitis, as well as to exclude other causes of brain inflammation.
• An electroencephalogram test: It is used for the diagnosis of autoimmune encephalitis because it checks for a seizure or other abnormal electrical activity in the brain.
• Blood tests: These help to determine if the disease is being aggravated by autoimmunity or some latent infections.

How is autoimmune encephalitis treated?

Main goals of treatment include reducing inflammation and stopping further brain injury. Common treatments include immunosuppressive drugs and supportive care. Examples of common treatments are:

• Corticosteroids: This category includes drugs that reduce inflammation such as prednisone.
• IVIG: Intravenous immunoglobulin helps in changing the immune response.
• Plasmapheresis: This process removes autoantibodies from the blood to decrease their harmful influence on the disease.
• Rituximab: This is a monoclonal antibody that reduces the production of autoantibodies by attacking the CD20-positive B cells.
• Anticonvulsants: The aim of anticonvulsants is to control seizures.
• Psychiatric drugs: These are used to treat psychiatric disorders and improve the life quality of the patient.

What are the long term outlooks and care for autoimmune encephalitis?

The prognosis on long-term duration depends on underlying aetiology and efficacy of treatment. General outcomes of this condition are mainly dependent on aggression and timeliness of the prescribed treatment. Most patients show desirable results with that treatment. The rest, sometimes with mental signs, peculiar motor activities, and persisting alterations in cognitive sphere, are strongly deteriorated qualitatively regarding their lives.

Over long-lasting treatment, one typically applies the multidisciplinary approach, as a rule to the therapy in autoimmune encephalitis; it may contain

• Frequent follow-up: Relapses or problems should be identified early by monitoring the patient with an immunologist or neurologist.
• Cognitive rehabilitation: This treatment helps in the recovery of a patient suffering from chronic cognitive impairment.
• Psychiatric care: Management of persistent psychiatric symptoms is necessary to improve a patient's mental health.
• Physical therapy: The functional capacities of a patient can be improved by addressing aberrant motions or motor dysfunction.
• Supportive care: The patient's general health needs to be improved by controlling symptoms like autonomic dysfunction and sleep problems.

Autoimmune encephalitis must be identified and treated as soon as possible to improve outcomes and lower morbidity and mortality.

Why Tender Palm Super-Speciality Hospital for Autoimmune encephalitis?

Tender Palm Hospital, owned by doctors, is renowned for attracting the most experienced professional in the country. With the finest neurologist and neurosurgeons specialized in autoimmune encephalitis. Tender Palm stands out as the premier Neurology hospital in Lucknow, India. Boasting cutting-edge infrastructure and advanced technology, Tender Palm ensures top-notch medical care for its patients.

To seek an expert consultation for any Neurology condition

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