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Related Concept Videos

Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
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...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
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...

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Related Experiment Video

Updated: Jul 27, 2026

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

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Acute metabolic encephalopathy: an introduction.

J V Leonard1

  • 1Biochemistry, Endocrinology and Metabolism Unit, Institute of Child Health, London, UK. jvleonard@doctors.org.uk

Journal of Inherited Metabolic Disease
|May 4, 2005
PubMed
Summary

Acute encephalopathy in inborn errors of metabolism is a serious condition requiring urgent diagnosis and treatment. Understanding the underlying causes is crucial for effectively managing complications.

Area of Science:

  • Biochemistry
  • Neurology
  • Genetics

Background:

  • Acute encephalopathy is a frequent and severe complication in individuals with inborn errors of metabolism (IEMs).
  • The diverse etiologies of acute encephalopathy in IEMs necessitate rapid diagnostic and therapeutic interventions.
  • Pathogenesis is often poorly understood, complicating the management of associated clinical manifestations.

Purpose of the Study:

  • To review the common causes of acute encephalopathy in inborn errors of metabolism.
  • To highlight the urgency in diagnosis and treatment for these patients.
  • To discuss the challenges in understanding pathogenesis and managing complications.

Main Methods:

  • Literature review of acute encephalopathy in inborn errors of metabolism.

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  • Synthesis of current knowledge on diagnostic and therapeutic approaches.
  • Analysis of the impact of poorly understood pathogenesis on treatment outcomes.
  • Main Results:

    • Inborn errors of metabolism present a significant risk for acute encephalopathy.
    • Prompt diagnosis and treatment are critical for patient outcomes.
    • Limited understanding of disease mechanisms hinders effective management of complications.

    Conclusions:

    • Acute encephalopathy in IEMs is a critical clinical challenge.
    • Further research into the pathogenesis of these conditions is essential for improving treatment strategies.
    • Multidisciplinary approaches are vital for managing patients with IEMs and acute encephalopathy.