RESUMO
PURPOSE: We undertook this study to investigate discrepancies in C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) values, and variations following intravenous immunoglobulin (IVIG) therapy in Kawasaki disease (KD). METHODS: A total of 123 KD patients were retrospectively enrolled. Patients were treated with IVIG 2 g/kg at 2 to 9 days after disease onset. We obtained white blood cell (WBC) count, percentage of neutrophils (% neutrophils), CRP, ESR, and N-terminal pro-brain natriuretic peptide (NT-proBNP) values before and 48 to 72 hours after IVIG treatment. Discrepancy was defined as CRP ≥10 mg/dL and ESR <50 mm/hr (Group 1), or CRP <10 mg/dL and ESR ≥50 mm/hr (Group 2). RESULTS: Thirty-six of 123 subjects (29.2%) had a discrepancy: 25 (20.3%) in Group 1 and 11 (8.9%) in Group 2. In Group 1, 15 patients (60%) had fever for <5 days (early presenter) and 10 (40%) had fever for ≥5 days (late presenter). There were six early presenters (55%) and five late presenters (45%) in Group 2. Late presenters had higher ESR than early presenters (34.3±21.0 mm/hr vs. 26.3±19.3 mm/hr, P=0.029). After IVIG treatment, elevated WBC count, % neutrophils, CRP, and NT-proBNP levels normalized. In contrast, ESR increased from 37.4±21.9 mm/hr to 48.0±22.7 mm/hr (n=36, P=0.051). CONCLUSIONS: A discrepancy may be related to the duration of fever. Due to discrepancies in CRP and ESR values in acute KD, both should be measured to assess the degree of inflammatory activity before IVIG treatment. After IVIG treatment, the ESR should not be used as a marker of response to therapy in KD.