The Clinical, Laboratory and Imaging Tests in Diagnosing Acute Appendicitis in Children: A Retrospective Study in a TertiaryUniversity Hospital in Tehran, Iran

Background: acute appendicitis (aa) is a common cause of emergency room visits among children. non-specific symptoms of appendicitis may pose a major challenge. due to the lack of access to imaging modalities in all facilities and its high cost, the evaluation of clinical symptoms and examination results is important in diagnosing acute appendicitis. methods: this study is a retrospective cross-sectional study. patients admitted to our emergency department and were suspected of having acute appendicitis by pediatric residents, and underwent an appendectomy during 2013-2018 were included. a checklist of the patients’ clinical signs and symptoms, and laboratory results and imaging findings completed from the records of these patients. results: we reviewed the files of 300 patients with a clinical diagnosis of acute appendicitis and having an appendectomy. leukocytosis was found in 248 (82.7%), neutrophilia in 240 (80%) and crp level equal or above 12 mg/l was observed in 107 (35.7%) patients. ultrasound was performed in 283 patients (94.33%); of which 228 (80.56%) were reported as acute appendicitis. abdominal ct scan was performed in 19 patients (6.33%); of which acute appendicitis was reported in 17 patients (89.47%). conclusion: the results of this research showed that rlq tenderness, and nausea/vomiting are the most common signs and symptoms, and leukocytosis is the most common laboratory finding in children with acute appendicitis. it can be suggested that relying just on the clinical presentation of aa (rlq tenderness, fever, nausea/vomiting, anorexia and leukocytosis), can lead to the correct diagnosis of 78% of the suspected patients.