[Kawasaki's disease in remission with cardiac involvement: intrasacular thrombus in a giant aneurism of both coronary arteries. Case report].

Kawasaki disease is of relevance in pediatric practice because it is a systemic vasculitis of unknown origin and the most common cause of acquired heart disease in young patients. Its main complication is the formation of a coronary aneurysm in 25% of patients, unless they receive timely medical treatment. We report the case of a 4 month old male child with Kawasaki's disease, received treatment with gammaglobulin and acetyl-salicylic acid, in which the initial echocardiogram showed aneurysms.