A Masquerader of Disease: An Incomplete Presentation of Kawasaki Disease

Kawasaki disease (KD) is a systemic pediatric vasculitis that most commonly affects children between the ages of 6 months and 4 years. The diagnosis of KD requires a high degree of clinical suspicion. In younger patients (less than 6 months) the diagnosis is exceedingly difficult as these patients typically do not meet the criteria to diagnosis KD clinically. Oftentimes, these younger patients do not meet enough of the criteria to warrant ordering an echocardiogram. We report a case of a 6-month-old Caucasian female who presented with high fevers originally thought to be due to a urinary tract infection. The patient required multiple echocardiograms in order to be diagnosed with incomplete KD. The patient was treated with IVIG and aspirin per standard of care, and experienced resolution of fevers and illness.