- to determine most common pediatric abdominal and pelvic lesions that may mimic acute abdomen - to describe radiographic features of pediatric abdominal and pelvic lesions that may mimic acute abdomen - to outline our examination protocol in children with acute abdomen

Acute abdomen describes the sudden starting of abdominal pain with unexplained etiology [1,8]. It is one of the most common problems in children admitted to the pediatric emergency department (ED) [1,2,3,6]. The symptoms and signs that suggest acute abdomen include rebounding pain, involuntary guarding or rigidity, abdominal distention and diffuse tenderness. However, acute abdomen may not be easily diagnosed in young children based on these clinical presentations because of their poor ability to express themselves [2,3,4,9]. Patients may suffer from acute surgical abdomen, acute abdomen...

Since 2009, 15557 children with acute abdomen have been hospitalized at the our institute, 23,5% of them had acute appendicitis, 20% - mesenteric adenitis, 55% were boys, 45% were girls. CT and MRI were performed after ultrasound, if ultrasound results were unclear. CT/MRI was performed in 70 patients (0,5%). Abdominal and pelvic lesions were revealed in 54 children (0,35%), 18 were boys, 36 were girls. Ourexamination protocol in children with acute abdomen: Medical history Physical examination Blood test, urinalysis Abdominal and pelvic ultrasound CT or...

Numerous abdominal and pelvic lesions could be the cause of acute abdomen or can mimic acute abdomen. The differential diagnosis should be done as soon as possible, it warrants complex examination including medical history, physical examination, abdominal and pelvic ultrasound andCT/MRI in children with unclear ultrasound results.

M. Akhlebinina; Moscow/RU - nothing to disclose I. Melnikov; Moscow/RU - nothing to disclose T. Kostikova; Moscow/RU - nothing to disclose T. Akhadov; Moscow/RU - nothing to disclose M. Ublinskiy; Moscow/RU - nothing to disclose

1.Sapmaz, Ferdane, et al. "Non-Surgical Causes of Acute Abdominal Pain."Actual Problems of Emergency Abdominal Surgery(2016): 95. 2.Tseng, Yu-Ching, et al. "Acute abdomen in pediatric patients admitted to the pediatric emergency department."Pediatrics & Neonatology49.4 (2008): 126-134. 3.Tsalkidis, Aggelos, et al. "Acute abdomen in children due to extra‐abdominal causes."Pediatrics International50.3 (2008): 315-318. 4.Leung, Alexander KC, and DAVID L. Sigalet. "Acute abdominal pain in children."American family physician67.11 (2003): 2321-2328. 5.Dingeldein, Michael W. "Pediatric Abdominal Masses."Common Surgical Diseases. Springer, New York, NY, 2015. 283-285. 6.Yang, Wen-Chieh, Chun-Yu Chen, and...