• Fatih Tanrıverdi, Çağdaş Yıldırım, Alp Şener, and Özcan Erel.
• Department of Emergency Medicine, Ankara City Hospital, Ankara, Turkey.
• Indian J Med Res. 2022 Feb 1; 155 (2): 280285280-285.

Background & ObjectivesContinuous subclinical inflammation can be seen in patients with familial Mediterranean fever (FMF) during the attack-free period. The importance of oxidative stress parameters in acute appendicitis (AA) progression has also been shown in previous studies. So, oxidative stress and the oxidant/antioxidant balance may play a role in this persistent subclinical inflammation. With this background the main objective of this study was to investigate the usefulness of combining the thiol-disulfide homeostasis parameters and the neutrophil-to-lymphocyte ratio (NLR) in the differential diagnosis of AA and an acute FMF attack.MethodsThe present study was conducted prospectively with 84 patients who were admitted to the emergency department between May 1, and December 31, 2018. Another 40 healthy individuals were assigned as the control group. The homeostasis parameters of thiol-disulfide were measured by a spectrophotometric method and NLR was measured in the patient and control groups.ResultsNative thiol and total thiol values were lower, while disulfide values were insignificantly higher in patients with AA than in patients with FMF. The white blood cell (WBC), neutrophil and NLR values were significantly higher in the AA group (P<0.001, P<0.001, P<0.001, respectively). When the neutrophil cut-off value for AA was set at 8.55, the calculated sensitivity was 80 per cent, the specificity was 72.2 per cent, and the area under the curve was 0.837.Interpretation & ConclusionsThe results of this study suggest that neutrophil, WBC and NLR values can be useful in the differentiation of AA from an acute FMF attack.

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