Medicina clinica · 2026
Serum amyloid A as predictive factor in PFAPA syndrome attack.
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Kazanasmaz Halil, Gündoğmuş Fırat, Eroğlu Ender Can, Kalyoncu Mukaddes
Аннотация
PURPOSE: This study aimed to assess the diagnostic value of serum amyloid A (SAA) levels during attacks of periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome.
METHODS: A retrospective analysis was conducted on the medical records of 51 children diagnosed with PFAPA and 51 control patients. Serum levels of SAA, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and the neutrophil-to-lymphocyte ratio (NLR) were measured.
RESULTS: The median SAA levels were significantly higher in the PFAPA group than in controls (p<0.05). ROC analysis revealed that SAA had a sensitivity of 100% and a specificity of 96.1% at a cutoff value of ≥12.43mg/L, outperforming CRP and ESR in diagnostic accuracy. While CRP and ESR had high sensitivities (90.2% and 90%, respectively), their specificities were lower (96% and 58.8%, respectively). Moreover, the high positive predictive value of SAA underscores its potential role as a reliable marker for the differential diagnosis of PFAPA.
CONCLUSION: SAA is a highly sensitive and specific marker for PFAPA attack, showing greater diagnostic accuracy compared to CRP and ESR. These findings suggest that SAA can serve as a valuable biomarker in the differential diagnosis of PFAPA.
METHODS: A retrospective analysis was conducted on the medical records of 51 children diagnosed with PFAPA and 51 control patients. Serum levels of SAA, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and the neutrophil-to-lymphocyte ratio (NLR) were measured.
RESULTS: The median SAA levels were significantly higher in the PFAPA group than in controls (p<0.05). ROC analysis revealed that SAA had a sensitivity of 100% and a specificity of 96.1% at a cutoff value of ≥12.43mg/L, outperforming CRP and ESR in diagnostic accuracy. While CRP and ESR had high sensitivities (90.2% and 90%, respectively), their specificities were lower (96% and 58.8%, respectively). Moreover, the high positive predictive value of SAA underscores its potential role as a reliable marker for the differential diagnosis of PFAPA.
CONCLUSION: SAA is a highly sensitive and specific marker for PFAPA attack, showing greater diagnostic accuracy compared to CRP and ESR. These findings suggest that SAA can serve as a valuable biomarker in the differential diagnosis of PFAPA.