Unstable angina in a patient with mucocutaneous lymph node syndrome.

An 11-year-old boy with mucocutaneous lymph node syndrome, who later developed an acute anteroseptal infarction and unstable angina, is presented. Anginal attacks were shown by 24-hour long-term ambulatory electrocardiographic recording. He was shown to have multiple coronary aneurysms with thrombi, and underwent a successful aorto-coronary bypass.