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Histological composition and progression of carotid plaque

Liz Andréa Villela Baroncini1, Antonio Pazin Filho, Simone Gusmão Ramos

  • 1Department of Internal Medicine, Faculdade de Medicina de Ribeirão Preto, University of São Paulo, São Paulo, Brazil. lizandreabaroncini@hotmail.com

Thrombosis Journal
|February 28, 2007
PubMed

Insights

Carotid plaque composition can be similar in symptomatic and asymptomatic patients. Complex plaques, even in asymptomatic individuals, may indicate vulnerability, necessitating close clinical evaluation.

Area of Science:

  • Vascular Biology
  • Cardiovascular Pathology
  • Histopathology

Background:

  • Carotid plaque histology and progression are crucial for understanding cerebrovascular disease.
  • Atherosclerosis in the carotid arteries can lead to stroke, highlighting the need for plaque characterization.

Purpose of the Study:

  • To analyze the histological composition and progression of carotid plaques.
  • To compare plaque characteristics between symptomatic and asymptomatic patients with high-grade carotid stenosis.

Main Methods:

  • Histological analysis and inflammatory cell quantification of 31 excised carotid plaques from patients undergoing carotid endarterectomy.
  • Comparison of plaques from symptomatic (n=17) and asymptomatic (n=14) patients.
  • Use of 9 non-diseased human cadaver carotid arteries as control tissue.

Main Results:

  • 58% of carotid plaques were classified as complex, exhibiting features like surface defects, hemorrhage, or thrombus.
  • No significant difference in inflammatory cell concentration was observed between symptomatic and asymptomatic groups.
  • Control specimens were classified as pre-atheroma with extracellular lipid pools.

Conclusions:

  • Histological composition of carotid plaques can be similar in both symptomatic and asymptomatic individuals.
  • Vulnerability can be associated with fibrotic and calcific plaques, while complex plaques may be clinically silent.
  • Asymptomatic carotid stenosis warrants close clinical monitoring without invasive diagnostic methods.
Abstract

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