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Related Concept Videos

Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
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...
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...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...

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Related Experiment Video

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Middle Cerebral Artery Occlusion Allowing Reperfusion via Common Carotid Artery Repair in Mice
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Coccidioidal cerebral abscess with peripheral restricted diffusion.

S Castro1, I Bernardes

  • 1Neuroradiology Department, Hospital de São João, 4200-319Porto, Portugal. snacastro@portugalmail.pt

Journal of Neuroradiology = Journal De Neuroradiologie
|February 13, 2009
PubMed
Summary
This summary is machine-generated.

This case study highlights a brain abscess with unusual imaging, specifically peripheral water-motion restriction. Reduced diffusion in certain areas may indicate a fungal cause for brain abscesses.

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Area of Science:

  • Neurology
  • Radiology
  • Infectious Diseases

Background:

  • Brain abscesses are serious intracranial infections requiring accurate diagnosis.
  • Typical imaging findings can sometimes be misleading or atypical.

Observation:

  • A case of brain abscess presented with unusual imaging characteristics.
  • Peripheral water-motion restriction was a notable atypical feature observed on imaging.

Findings:

  • Reduced diffusion on imaging, particularly at intracavitary projections, is a key finding.
  • This pattern of reduced diffusion suggests a potential fungal etiology for the brain abscess.

Implications:

  • Recognizing atypical imaging features is crucial for diagnosing brain abscesses.
  • Diffusion-weighted imaging findings can aid in differentiating the cause of brain abscesses, especially fungal infections.