Some laboratory data, such as erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), albumin and N-terminal pro-B-type natriuretic peptide (NT-proBNP) level, thrombocytosis, leukocytosis, raised transaminases, hyponatremia, and pyuria, may be helpful in the diagnosis of KD (Cho et al., 2011; Lin et al., 2015; Reddy et al., 2016; Dionne et al., 2017), but all of them are yet to find the same change in other immune and infectious disease, and cannot act as special diagnostic indexes for KD. This evidence concerns the gene CRP and Hyponatremia.