Jejunal Duplication in a 10-Year-Old Boy Presenting with Generalized Oedema and Abdominal Distension.

Background: Gastrointestinal tract duplications are rare congenital anomalies, with the jejunum being the second most common site after the ileum. These duplications can vary in size, location, and presence of ectopic mucosa, significantly impacting clinical presentation and often requiring surgical intervention. Case presentation: A 10-year-old Thai boy with haemoglobin (Hb) E trait and iron deficiency anaemia presented with significant oedema and abdominal distention. Laboratory investigations revealed isolated hypoalbuminemia. Imaging studies, including computed tomography (CT) scan, demonstrated a large, loculated, rim-enhancing air-fluid collection adjacent to the jejunum, along with mild dilatation and wall thickening of the affected jejunal loop. The patient underwent exploratory laparotomy, which included jejunal resection and jejunojejunal end-to-end anastomosis. Conclusion: Jejunal duplications are uncommon in children and can present diagnostic challenges, potentially leading to serious complications. This case underscores the importance of considering jejunal duplication in paediatric patients with unexplained abdominal distention and protein-losing enteropathy. Early recognition and timely surgical management are crucial to prevent severe complications and improve patient outcomes. LEARNING POINTS: Jejunal duplications are rare congenital malformations, which can cause a range of symptoms, including bilious vomiting, abdominal pain, and obstruction.Our patient presented with iron deficiency anaemia, generalized oedema, including swelling of both legs, scrotum, and abdominal distension.The diagnosis was made by computed tomography scan.