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Biology is a natural science that studies life and living organisms, including their structure, function, development, interactions, evolution, distribution, and taxonomy. The field's scope is extensive and divided into several specialized disciplines, such as anatomy, physiology, ethology, genetics, and many more. All living things share a few key traits, including cellular organization, heritable genetic material and the ability to adapt/evolve, metabolism to regulate energy needs, the...
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Fluids differ from solids primarily in their molecular structure and stress response. Solids have tightly packed molecules with strong intermolecular forces, maintaining their shape and resisting deformation. In contrast, fluids have molecules spaced farther apart with weaker forces, allowing them to flow and deform easily.
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Related Experiment Video

Updated: Jan 22, 2026

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
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[Strokes and Giant cell arteritis: imaging characteristics].

Flora Ketz1, Alexandra Monti2, Athanasia Velentza2

  • 1Gériatrie aiguë polyvalente, GH Pitié-Salpêtrière - Charles-Foix (AP-HP), site Charles-Foix, 7, avenue de la République, 94200 Ivry-sur-Seine, France; UFR de médecine, université Paris-6, université Paris-Sorbonne, 91-105, boulevard de l'Hôpital, 75013 Paris, France.

Soins. Gerontologie
|July 17, 2019
PubMed
Summary

Giant cell arteritis (GCA) increases stroke risk. Differentiating GCA-related stroke from atherosclerotic stroke is crucial for accurate diagnosis and treatment.

Keywords:
IRMMRIaccident vasculaire cérébralcorticotherapycorticothérapiefacteur de risquegiant cell arteritismaladie de Hortonrisk factorsstroke

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Area of Science:

  • Neurology
  • Rheumatology
  • Vascular Medicine

Background:

  • Giant cell arteritis (GCA) is a systemic vasculitis.
  • GCA is linked to a higher risk of cardiovascular and cerebrovascular events, including stroke.
  • The incidence of stroke in GCA patients ranges from 2.7% to 7.4%.

Purpose of the Study:

  • To highlight the diagnostic challenges in differentiating stroke etiology in patients with concomitant GCA.
  • To present a case study illustrating the clinical and neuroimaging features of stroke in an elderly patient with GCA.

Main Methods:

  • Case report presentation.
  • Review of clinical presentation, diagnostic workup, and neuroimaging findings.
  • Discussion of differential diagnosis between GCA-related stroke and atherosclerotic stroke.

Main Results:

  • The case involved an elderly woman presenting with ischemic stroke.
  • The patient was concurrently diagnosed with GCA.
  • Specific brain imaging characteristics associated with GCA-related stroke were observed.

Conclusions:

  • Distinguishing between atherosclerotic stroke and GCA-related stroke is clinically significant.
  • Neuroimaging plays a vital role in identifying stroke patterns indicative of GCA.
  • Prompt diagnosis and management of GCA are essential to prevent cerebrovascular complications.