Autoimmune encephalitis: Difference between revisions
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{{SI}} | |||
{{Infobox medical condition | |||
| name = Autoimmune encephalitis | |||
| image = [[File:CT_scan_Rasmussen's_encephalitis.png|left|thumb|CT scan of Rasmussen's encephalitis, a type of autoimmune encephalitis]] | |||
| caption = CT scan showing [[Rasmussen's encephalitis]] | |||
| field = [[Neurology]] | |||
| symptoms = [[Seizures]], [[memory loss]], [[confusion]], [[hallucinations]], [[movement disorders]] | |||
| complications = [[Cognitive impairment]], [[neurological deficits]] | |||
| onset = Varies, can be acute or subacute | |||
| duration = Can be chronic | |||
| causes = [[Autoimmune disease]] | |||
| risks = [[Genetic predisposition]], [[viral infections]] | |||
| diagnosis = [[Clinical evaluation]], [[MRI]], [[EEG]], [[CSF analysis]], [[antibody testing]] | |||
| differential = [[Infectious encephalitis]], [[paraneoplastic syndrome]], [[primary psychiatric disorders]] | |||
| treatment = [[Immunotherapy]], [[corticosteroids]], [[plasmapheresis]], [[IVIG]], [[anticonvulsants]] | |||
| prognosis = Variable, depends on type and response to treatment | |||
| frequency = Rare | |||
}} | |||
* Inflammation of the [[brain]] secondary to an immune response triggered by the body itself. | * Inflammation of the [[brain]] secondary to an immune response triggered by the body itself. | ||
* Autoimmune encephalitis refers to a group of conditions that occur when the body's | * Autoimmune encephalitis refers to a group of conditions that occur when the body's  mistakenly attacks healthy brain, leading to inflammation of the brain. | ||
[[File:CNS lymphocytic encephalitis FFPE section.jpg|alt=lymphocytic encephalitis|thumb|lymphocytic encephalitis]] | [[File:CNS lymphocytic encephalitis FFPE section.jpg|alt=lymphocytic encephalitis|left|thumb|lymphocytic encephalitis]] | ||
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== Causes == | == Causes == | ||
* [[Rasmussen encephalitis]] | * [[Rasmussen encephalitis]] | ||
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* [[Sydenham's chorea]] | * [[Sydenham's chorea]] | ||
* [[PANS]] or [[PANDAS]] | * [[PANS]] or [[PANDAS]] | ||
== Signs and symptoms == | == Signs and symptoms == | ||
People with autoimmune encephalitis may have various neurologic and/or psychiatric symptoms. | People with autoimmune encephalitis may have various neurologic and/or psychiatric symptoms. | ||
Neurologic symptoms may include impaired [[memory]] and [[cognition]], abnormal movements, and/or problems with balance, speech, or vision. | Neurologic symptoms may include impaired [[memory]] and [[cognition]], abnormal movements, and/or problems with balance, speech, or vision. | ||
===Psychiatric symptoms === | ===Psychiatric symptoms === | ||
* Psychiatric symptoms may include psychosis, aggression, inappropriate sexual behaviors, panic attacks, compulsive behaviors, euphoria or fear. Symptoms may fluctuate, but often progress over days to a few weeks. | * Psychiatric symptoms may include psychosis, aggression, inappropriate sexual behaviors, panic attacks, compulsive behaviors, euphoria or fear. Symptoms may fluctuate, but often progress over days to a few weeks. | ||
* Symptoms can progress to loss of consciousness or even coma. | * Symptoms can progress to loss of consciousness or even coma. | ||
* Autoimmune encephalitis may be associated with | * Autoimmune encephalitis may be associated with  to  on the surface of nerve cells, or within nerve cells. Some of these proteins are involved in passing signals between nerve cells. | ||
* In some cases it occurs in association with | * In some cases it occurs in association with  (a paraneoplastic syndrome). | ||
Autoimmune encephalitis generally occurs sporadically, in people with no of the condition. | Autoimmune encephalitis generally occurs sporadically, in people with no of the condition. | ||
* ==Treatment== | * ==Treatment== | ||
* Treatment may involve intravenous immunosuppressive therapy, and | * Treatment may involve intravenous immunosuppressive therapy, and  removal when necessary. | ||
* Early treatment decreases the likelihood for long-term complications, speeds recovery, and reduces the risk of recurrence (relapse). If not treated, the condition can lead to progressive neurologic deterioration and loss of life. | * Early treatment decreases the likelihood for long-term complications, speeds recovery, and reduces the risk of recurrence (relapse). If not treated, the condition can lead to progressive neurologic deterioration and loss of life. | ||
==Diagnosis== | ==Diagnosis== | ||
Diagnosis of autoimmune encephalitis can be made when all three of the following criteria have been met: | Diagnosis of autoimmune encephalitis can be made when all three of the following criteria have been met: | ||
#. Subacute onset (rapid progression of less than 3 months) of working memory deficits (short-term memory loss), altered mental status, or psychiatric symptoms. | #. Subacute onset (rapid progression of less than 3 months) of working memory deficits (short-term memory loss), altered mental status, or psychiatric symptoms. | ||
#. At least one of the following: | #. At least one of the following: | ||
* New focal | * New focal  findings | ||
* not explained by a previously known seizure disorder | * not explained by a previously known seizure disorder | ||
* CSF pleocytosis ( count of more than five | * CSF pleocytosis ( count of more than five  per mm3) | ||
* features suggestive of encephalitis | * features suggestive of encephalitis | ||
#. Reasonable exclusion of alternative causes | #. Reasonable exclusion of alternative causes | ||
{{Diseases of the nervous system}} | {{Diseases of the nervous system}} | ||
[[Category:Encephalitis| ]] | [[Category:Encephalitis| ]] | ||
[[Category:Infectious diseases]] | [[Category:Infectious diseases]] | ||
Latest revision as of 16:50, 4 April 2025

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD medical weight loss NYC and sleep center NYC
| Autoimmune encephalitis | |
|---|---|
| Synonyms | N/A |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Seizures, memory loss, confusion, hallucinations, movement disorders |
| Complications | Cognitive impairment, neurological deficits |
| Onset | Varies, can be acute or subacute |
| Duration | Can be chronic |
| Types | N/A |
| Causes | Autoimmune disease |
| Risks | Genetic predisposition, viral infections |
| Diagnosis | Clinical evaluation, MRI, EEG, CSF analysis, antibody testing |
| Differential diagnosis | Infectious encephalitis, paraneoplastic syndrome, primary psychiatric disorders |
| Prevention | N/A |
| Treatment | Immunotherapy, corticosteroids, plasmapheresis, IVIG, anticonvulsants |
| Medication | N/A |
| Prognosis | Variable, depends on type and response to treatment |
| Frequency | Rare |
| Deaths | N/A |
- Inflammation of the brain secondary to an immune response triggered by the body itself.
- Autoimmune encephalitis refers to a group of conditions that occur when the body's  mistakenly attacks healthy brain, leading to inflammation of the brain.

Causes[edit]
- Rasmussen encephalitis
- Systemic lupus erythematosus
- Behcet's disease
- Hashimoto's encephalopathy
- Autoimmune limbic encephalitis
- Sydenham's chorea
- PANS or PANDAS
Signs and symptoms[edit]
People with autoimmune encephalitis may have various neurologic and/or psychiatric symptoms. Neurologic symptoms may include impaired memory and cognition, abnormal movements, and/or problems with balance, speech, or vision.
Psychiatric symptoms[edit]
- Psychiatric symptoms may include psychosis, aggression, inappropriate sexual behaviors, panic attacks, compulsive behaviors, euphoria or fear. Symptoms may fluctuate, but often progress over days to a few weeks.
- Symptoms can progress to loss of consciousness or even coma.
- Autoimmune encephalitis may be associated with  to  on the surface of nerve cells, or within nerve cells. Some of these proteins are involved in passing signals between nerve cells.
- In some cases it occurs in association with  (a paraneoplastic syndrome).
Autoimmune encephalitis generally occurs sporadically, in people with no of the condition.
- ==Treatment==
- Treatment may involve intravenous immunosuppressive therapy, and  removal when necessary.
- Early treatment decreases the likelihood for long-term complications, speeds recovery, and reduces the risk of recurrence (relapse). If not treated, the condition can lead to progressive neurologic deterioration and loss of life.
Diagnosis[edit]
Diagnosis of autoimmune encephalitis can be made when all three of the following criteria have been met:
- . Subacute onset (rapid progression of less than 3 months) of working memory deficits (short-term memory loss), altered mental status, or psychiatric symptoms.
- . At least one of the following:
- New focal  findings
- not explained by a previously known seizure disorder
- CSF pleocytosis ( count of more than five  per mm3)
- features suggestive of encephalitis
- . Reasonable exclusion of alternative causes
| Diseases of the nervous system, primarily CNS (G04–G47, 323–349) | ||||||||||||||||||||
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