The main criteria for atypical KD include fever for 5 days (or more) and 2 major clinical symptoms: CRP > 3.0 mg/dL or ESR 40 mm/h or, in its absence, at least 3 of the following 6 additional laboratory criteria: anemia for age, platelet count of 450,000/mm3 after the 7th day of fever, albumin 3.0 g/dL, elevated alanine transaminase, white blood cell count of 15,000/mm3, urine white blood cells ≥10/high-power field [5]. The gene discussed is CRP; the disease is anemia (phenotype).