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Kawasaki disease: basic and pathological findings

Kei Takahashi1, Toshiaki Oharaseki2, Yuki Yokouchi2

  • 1Department of Pathology, Toho University Ohashi Medical Center, 2-17-6 Ohashi, Meguro, Tokyo, 153-8515, Japan. keitak@oha.toho-u.ac.jp.

Clinical and Experimental Nephrology
|November 29, 2012
PubMed

Insights

Kawasaki disease (KD) is a systemic vasculitis affecting children, causing inflammation and damage to medium-sized arteries, particularly coronary arteries. Its exact cause is unknown, but infections and genetics play a role in its pathogenesis.

Area of Science:

  • Pediatrics
  • Rheumatology
  • Cardiology

Background:

  • Kawasaki disease (KD) is a systemic vasculitis primarily affecting infants and young children.
  • It targets medium-sized muscular arteries, with a significant predilection for coronary arteries.
  • The precise etiology remains unknown, though infectious agents and host genetics are implicated.

Purpose of the Study:

  • To elucidate the pathological progression of coronary arteritis in Kawasaki disease.
  • To understand the role of inflammatory cells, particularly monocytes/macrophages, in vascular lesion development.
  • To describe the evolution of arterial lesions from acute to chronic stages.

Main Methods:

  • Histological examination of arterial tissues at various stages post-KD onset.
  • Analysis of inflammatory cell infiltration and accumulation.
  • Observation of vascular structural changes, including dilation, aneurysm formation, and remodeling.

Main Results:

  • Coronary arteritis initiates 6-8 days after KD onset, involving all arterial layers.
  • Marked accumulation and aberrant activation of monocytes/macrophages characterize the inflammation.
  • Vascular lesions progress synchronously from acute inflammation to chronic injury, potentially leading to long-term structural changes like aneurysms.

Conclusions:

  • Kawasaki disease involves a profound inflammatory process targeting medium-sized arteries, especially coronary arteries.
  • Monocyte/macrophage activation is central to the pathogenesis of KD vasculitis.
  • The dynamic evolution of arterial lesions highlights the potential for lasting cardiovascular complications.

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