Resistant kawasaki disease in an infant causing giant coronary aneurysms with thrombosis

A 13 month-old boy male infant admitted for fever, generalized polymorphous exanthema, hyperemic conjunctivae, and diarrhea. The onset of the disease was approximately 2 weeks before the admission with a generalized polymorphous exanthema for which he received antihistaminic treatment, but after 7 days he associated fever, hyperemic conjunctivae, and diarrhea being admitted in the regional hospital. The fever persisted despite the antibiotic and symptomatic treatment, and therefore he was transferred in our hospital. The clinical exam at the time of admission revealed influenced general status, generalized polymorphous exanthema, hyperemic pharynx, bilateral conjunctivitis, and approximately five diarrheic stools per day. The laboratory tests revealed leukocytosis (27,050/mL), with neutrophilia (19,900/mL), anemia (Hb 6.9 g/dL, Htc 19.7%, MEV 68.6 fL, MEH 24 pg), thrombocytosis (1,111,000/ mL), elevated inflammatory biomarkers (CRP An Abstract Giant coronary artery aneurysms that occur in 0.5 to 1% of patients with Kawasaki disease can be fatal if associated with thrombosis. Some patients may show persistent inflammation and fever despite treatment with repeated doses of intravenous immunoglobulin (IVIG), steroids, and aspirin. This report describes an infant boy with resistant Kawasaki disease who presented with extensive coronary artery involvement and coronary thrombosis. His inflammation was not controlled with multiple doses of IVIG, parenteral and oral steroids, or high-dose aspirin, and he finally needed infliximab, a monoclonal antibody against tumor necrosis factor alpha.