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Related Concept Videos

Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...

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Related Experiment Video

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Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
26:48

Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis

Published on: July 4, 2007

Autoimmune encephalopathy.

Eoin P Flanagan1, Richard J Caselli

  • 1Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA.

Seminars in Neurology
|May 19, 2011
PubMed
Summary
This summary is machine-generated.

Autoimmune encephalopathy, particularly Hashimoto's encephalopathy, is a treatable neurological disorder. Early diagnosis and treatment with corticosteroids can lead to rapid improvement in many patients.

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Area of Science:

  • Neurology
  • Immunology
  • Neuroscience

Background:

  • Autoimmune encephalopathy is a complex neurological disorder with varied causes and outcomes.
  • It encompasses conditions like Hashimoto's encephalopathy, paraneoplastic encephalopathies, and CNS vasculitis.
  • Hashimoto's encephalopathy is the primary focus, characterized by autoimmunity without cancer.

Purpose of the Study:

  • To review the diagnosis and management of autoimmune encephalopathies, with an emphasis on Hashimoto's encephalopathy.
  • To differentiate between autoimmune encephalopathy subgroups and their therapeutic responses.
  • To highlight the diagnostic challenges and treatment strategies for these conditions.

Main Methods:

  • Diagnosis relies on clinical presentation, serologic markers, EEG abnormalities, and CSF analysis.
  • Neuroimaging may show meningeal enhancement or specific MRI signals.
  • Brain biopsy may be necessary to confirm perivascular lymphocytic infiltrates.

Main Results:

  • Nonspecific autoimmune encephalopathies, including Hashimoto's, are highly responsive to high-dose corticosteroids, often showing improvement within days.
  • Paraneoplastic encephalopathies typically require tumor removal and have a poorer prognosis.
  • CNS vasculitis may respond to steroids but often needs additional immunosuppressants like cyclophosphamide.

Conclusions:

  • Autoimmune encephalopathies are distinct from paraneoplastic syndromes and CNS vasculitis in their therapeutic responsiveness.
  • Prompt diagnosis and treatment, especially with corticosteroids for Hashimoto's encephalopathy, are crucial for favorable outcomes.
  • While challenging, distinguishing these subgroups is vital for effective patient management.