Histopathological aspects of cardiovascular lesions in Kawasaki disease

Area of Science:

• Cardiovascular Pathology
• Pediatric Rheumatology

Background:

• Kawasaki disease (KD) is the most frequent vasculitic syndrome.
• It primarily impacts medium-sized arteries, with a particular predilection for the coronary arteries.

Purpose of the Study:

• To detail the histological progression of coronary arteritis in Kawasaki disease.
• To identify the key inflammatory cells involved in the pathogenesis of KD vasculitis.

Main Methods:

• Histological examination of affected arteries at various disease stages.
• Analysis of inflammatory cell infiltrates within the arterial wall.

Main Results:

• Coronary arteritis in KD initiates 6-8 days post-onset, affecting all arterial layers and causing dilation.
• The inflammatory infiltrate is predominantly composed of monocytes and macrophages, with neutrophils also implicated in early stages.
• Inflammatory cell infiltration persists for up to 25 days, followed by a gradual decline, with lesions evolving synchronously from acute to chronic phases.

Conclusions:

• The study elucidates the temporal and cellular dynamics of coronary arteritis in Kawasaki disease.
• Understanding these processes is crucial for managing arterial damage and potential long-term complications like aneurysms.