Performance of diagnostic criteria in pediatric Behçet's disease.

Behçet's disease is an inflammatory vasculitic disease of unknown etiology characterized by recurrent oral and genital ulcers, ocular findings, and multiple organ involvement. Mucocutaneous findings are the most common symptoms. The most used diagnostic criteria are International Criteria for BD (ICBD), International Study Group (ISG) criteria and pediatric Behçet's disease criteria (PEDBD). Although diagnostic criteria have been defined, the diagnosis is still difficult due to clinical findings developed in pediatric patients. The aim of this study was to evaluate the clinical findings, phenotype characteristics, sensitivity and specificity of diagnostic criteria, and the course of pediatric Behçet's disease (BD). We evaluated retrospectively the files of 67 (29 M/38 F) patients diagnosed with BD according to expert opinion. The patients were reclassified according to ISG, ICBD, and PEDBD criteria. The control group consisted of a total of 69 patients with BD-mimicking diseases or presenting at least one major BD sign followed at the same center. Sensitivity and specificity were evaluated for the criteria. The mean age of diagnosis was 13.38 ± 3.2 years. There were oral aphthous ulcers in 98.5%, genital ulcers in 68.7%, skin lesions in 31.3%, vascular involvement in 17.9%, neurological involvement in 11.9%, positive pathergy test in 33.8%, and positive HLA-B51 in 57.1% of patients. The sensitivity of ICBD, ISG and PEDBD criteria was 88.1, 43.3, and 37.3%, respectively. The specificity of ICBD, ISG, and PEDBD criteria was 100%. Diagnosis of BD in childhood is still difficult. ICBD criteria have the highest sensitivity among the diagnostic criteria. These criteria can also be used in childhood.