The most dreadful complication of Kawasaki disease is
Kawasaki disease is an acute, febrile, usually self-limited illness of infancy and childhood (80% of the patients are younger than 4 years of age) associated with an aeritis of mainly large to medium-sized vessels. Its clinical significance stems from the involvement of coronary aeries. Coronary aeritis can cause aneurysms that rupture or thrombose, resulting in myocardial infarction. (Robbins basic pathology,9th edition,pg no.352)
Rash
Lymph node
Cardiac involvement
Thrombocytosis
Cardiovascular system