• Gürkan Altuntaş, Mehmet Altuntaş, Melih Imamoğlu, Muhammet Kadri Çolakoğlu, Hüseyin Avni Uydu, and Recep Bedir.
• Recep Tayyip Erdogan University, Faculty of Medicine, Department of Emergency Medicine - Rize, Turkey.
• Rev Assoc Med Bras (1992). 2023 Jan 1; 69 (8): e20230076e20230076.

ObjectiveAcute appendicitis is one of the most common surgical causes of an acute abdomen among patients admitted to the emergency room due to abdominal pain. The clinical diagnosis of acute appendicitis is usually difficult and is made by evaluating the clinical, laboratory, and radiological findings together. The aim of this study was to investigate the diagnostic potential of signal peptide-CUB-EGF-like domain-containing protein 1 as a biomarker for acute appendicitis.MethodsA total of 67 adult patients without any comorbidities who presented to the emergency department with abdominal pain and were clinically diagnosed with acute appendicitis were included in the case group. The patients included in the study were classified into the negative appendectomy group and the acute appendicitis group according to their histopathological final diagnosis. In addition, 48 healthy volunteers without comorbidities were included in the control group. Signal peptide-CUB-EGF-like domain-containing protein 1 levels of patients and the control group were measured.ResultsAccording to postoperative histopathological examinations of the patients, 7 (10.4%) patients were diagnosed with negative appendectomy, and 60 (89.6%) patients were diagnosed with acute appendicitis. Signal peptide-CUB-EGF-like domain-containing protein 1 levels were higher in the patients with acute appendicitis than in negative appendectomy patients (p=0.012). Signal peptide-CUB-EGF-like domain-containing protein 1 levels were also higher in the case group compared to the control group (p=0.001).ConclusionThe admission signal peptide-CUB-EGF-like domain-containing protein 1 level was significantly higher in adults with acute appendicitis. The SCUBE1 level is a novel but promising biomarker that aids in the diagnosis of acute appendicitis.

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