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An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
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Correlations between histopathological findings and clinical manifestations in biopsy-proven giant cell arteritis

Francesco Muratore1, Luigi Boiardi1, Alberto Cavazza2

  • 1Rheumatology Unit, Department of Internal Medicine, Azienda Ospedaliera ASMN, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia, Italy.

Journal of Autoimmunity
|March 25, 2016
PubMed

Insights

Temporal artery biopsy (TAB) findings can predict giant cell arteritis (GCA) complications. Histopathological features like giant cells and calcifications correlate with cranial ischemic events and visual loss, aiding patient management.

Area of Science:

  • Rheumatology
  • Pathology
  • Vascular Medicine

Background:

  • Giant cell arteritis (GCA) is a systemic vasculitis affecting large and medium arteries.
  • Temporal artery biopsy (TAB) is a key diagnostic tool for GCA.
  • Understanding the correlation between TAB histopathology and clinical outcomes is crucial for patient management.

Purpose of the Study:

  • To investigate the association between histopathological features identified in temporal artery biopsies (TABs) and the clinical manifestations of giant cell arteritis (GCA).
  • To identify specific pathological findings in TAB that predict adverse outcomes in patients with biopsy-proven GCA.

Main Methods:

  • A retrospective analysis of temporal artery biopsies (TABs) from patients with biopsy-proven GCA was conducted.
  • Histopathological features including inflammation severity, intimal hyperplasia, thrombosis, calcifications, giant cells, and necrosis were evaluated by a blinded pathologist.
  • Clinical data, including cranial ischemic events (CIEs) and visual manifestations, were correlated with TAB findings.

Main Results:

  • In 274 patients with GCA, cranial ischemic events (CIEs) occurred in 58.8% and permanent visual loss in 18.6%.
  • Predictors for CIEs included older age, lower ESR, presence of giant cells, and laminar necrosis on TAB.
  • Predictors for permanent visual loss included lower CRP and the presence of calcifications on TAB.

Conclusions:

  • Histopathological features observed in temporal artery biopsies (TABs) can predict specific clinical manifestations of giant cell arteritis (GCA).
  • Findings such as giant cells, laminar necrosis, and calcifications are associated with increased risk of CIEs and visual loss.
  • These correlations have potential implications for tailoring patient management strategies in GCA.
Abstract

Keywords:
Colour duplex ultrasonographyGiant cell arteritisHistopathologyIschemic complicationsTemporal arteritisTemporal artery biopsyVisual loss

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