Table 2. KD-compatible clinical and laboratory findings that may cause diagnostic and therapeutic confusion

Chief complaints	Diagnostic pitfalls	Initial diagnosis	Nonessential treatment
Fever	Pyuria	Urinary tract infection	Cefotaxime
Lethargy	Culture-negative shock	Septic shock	Vancomycin + meropenem
Neck swelling	Abnormalities on neck CT	Retropharyngeal abscess	Incision and drainage
Headache	Pleocytosis	Meningitis	Vancomycin + cefotaxime
Seizure	Stupor and coma	Encephalopathy	Acyclovir + cefotaxime
Drooling	Unable to close eyes	Facial palsy due to herpes	Steroids + acyclovir
Cough	Interstitial infiltrates on X-ray	Mycoplasma pneumonia	Erythromycin
Abdominal pain	Abnormalities on P/Ex	Appendicitis	Appendectomy
Vomiting	Elevated amylase	Pancreatitis	NPO
Anorexia	Elevated liver transaminase	Hepatitis	Ornithine aspartate
Joint swelling	Leukocytosis in joint fluids	Osteomyelitis	Orthopedic surgery
Joint pain	Multiple joint inflammation	JIA	Steroids + methotrexate
FUO	Hemophagocytosis on BM	Secondary HLH	Chemotherapy

KD: Kawasaki disease; CT: computed tomography; P/Ex: physical examinations; NPO: nothing per oral; JIA: Juvenile idiopathic arthritis; FUO: fever of unknown origin; BM: bone marrow; HLH: hemophagocytic lymphohistiocytosis.