Incomplete Kawasaki Disease in a 44-day-old baby

Kawasaki disease (KD) is an acute systemic vasculitis usually affecting children <5 years old. We report a 44-dayold baby who had persistent fever despite being on antibiotics for presumed sepsis. Erythema of Bacillus Calmette-Guerin (BCG) scar and thrombocytosis were noted on day-2 of illness. Diagnosis of incomplete KD was made on the 10th day of illness. Her fever resolved with intravenous immunoglobulin, but echocardiogram revealed coronary artery aneurysm. High index of suspicion is required to diagnose KD in infants ≤3 months since it is rare and commonly presents with incomplete clinical features. The presence of unexplained fever for ≥5 days with erythema of BCG scar or thrombocytosis in infants should alert the clinicians of KD.