Kawasaki Disease: Mucocutaneous Findings and Treatment

Overview / Definition Kawasaki Disease (KD) is an acute, self-limiting vasculitis that predominantly affects children under the age of five. It is characterized by a constellation of clinical findings, including fever, rash, conjunctivitis, oral mucosal changes, and cervical lymphadenopathy. KD is significant due to its potential to cause coronary artery aneurysms if left untreated. Epidemiology Kawasaki Disease is the most common cause of acquired heart disease in children in developed countries. The incidence varies significantly by geography, with higher rates observed in Japan, where it was first described. Key epidemiological points include: Prevalence is highest in children aged 6 months to 5 years. Higher incidence in males (approximately 1.5-2 times more than females). Seasonal peaks, with increased cases reported in winter and spring. Pathophysiology / Mechanism The exact etiology of Kawasaki Disease remains unknown, but it is thought to involve a combination of infectious triggers and immune dysregulation. Proposed mechanisms include: Infection by viral agents, such as Epstein-Barr virus. Altered immune response leading to vascular inflammation. Genetic predisposition in certain populations. Clinical Presentation The clinical presentation of Kawasaki Disease is characterized by a series of symptoms that follow a classic pattern: Fever: Persistent fever lasting more than 5 days. Conjunctivitis: Bilateral, non-exudative conjunctivitis. Oral findings: Strawberry tongue, dry cracked lips, and erythema of the oral mucosa. Rash: Polymorphous rash, often maculopapular. Cervical lymphadenopathy: Typically unilateral, with lymph nodes greater than 1.5 cm. The diagnosis of KD is made when a child meets at least five of the six criteria or has incomplete Kawasaki Disease (fewer than five criteria but with significant coronary artery involvement). Diagnosis / Workup Diagnosis of Kawasaki Disease is primarily clinical but can be supported by laboratory findings: Labora