Internal Hernia as a Cause of Acute Abdomen in a Pediatric Patient.

An acute abdomen is a complex case with multiple possible etiologies and requires the help of many different disciplines. We present the case of a two-year-old female who presented to the emergency department in acute distress, pale in complexion, and continuously guarding her abdomen. Physical examination revealed a distended, rigid abdomen with tenderness to palpation of the abdomen in all four quadrants. A computed tomography scan illustrated markedly dilated loops of small bowel but unclear etiology of obstruction with no evidence of perforation. Stat diagnostic laparotomy showed a strangulated internal hernia secondary to a congenital mesenteric defect. The mesenteric defect was repaired laparoscopically, and 25 cm of necrotic bowel was resected with an end-to-end anastomosis. Internal hernias secondary to mesenteric defects are the most common forms of internal hernias in pediatric patients and present with a 100% mortality rate if left untreated. This case illustrates the importance of a high index of suspicion, thorough physical examination, prompt diagnosis, and treatment in preventing a fatal outcome in these patients.