Has joint involvement lessened in Kawasaki disease?

Area of Science:

• Pediatrics
• Rheumatology
• Cardiology

Background:

• Kawasaki disease (KD) is a critical pediatric vasculitis affecting medium-sized arteries, primarily coronary arteries.
• Diagnosis relies on prolonged fever and characteristic clinical signs, sometimes including acute arthritis.
• Cardiac complications are a major concern in KD management.

Purpose of the Study:

• To determine the prevalence of arthritis at KD diagnosis.
• To assess the response of arthritis to intravenous immunoglobulin (IVIG) treatment.
• To investigate the relationship between arthritis and cardiac findings in KD patients.

Main Methods:

• Retrospective review of medical records for 42 KD patients diagnosed between 1988 and 2013.
• Analysis of demographic, clinical, laboratory, and treatment variables.
• Evaluation of echocardiography findings and articular involvement patterns.

Main Results:

• Arthritis was present in 16% of KD patients, manifesting as oligoarticular, monoarticular, or polyarticular patterns.
• All patients showed elevated acute phase reactants; however, IVIG treatment led to good therapeutic response without sequelae.
• Eight patients had echocardiographic alterations (ectasia/aneurysm), and four with incomplete KD developed coronary artery abnormalities.

Conclusions:

• Acute arthritis is an infrequent finding in Kawasaki disease and does not lead to long-term joint sequelae.
• IVIG and aspirin treatment may prevent articular complications, potentially reducing the need for rheumatology follow-up.
• Cardiovascular sequelae, particularly in incomplete KD, remain the primary determinant of prognosis, with arthritis seemingly not influencing cardiac involvement.