Preoperative diagnosis of ileal duplication cyst in an adult using dynamic imaging and treatment with single-incision laparoscopic surgery

We report a rare case of an ileal duplication cyst diagnosed preoperatively in a 72-year-old woman who presented with incidental hematuria. Imaging studies including abdominal ultrasonography and magnetic resonance imaging (MRI) revealed a 6-cm cystic lesion exhibiting peristaltic movement and layered wall structure, suggestive of an alimentary duplication cyst. Based on these characteristic findings, a single-incision laparoscopic resection of the cyst and adjacent ileum was performed without complications. Histological examination confirmed a non-communicating cystic duplication with smooth muscle and columnar epithelium. The patient recovered uneventfully. This case highlights the diagnostic value of dynamic imaging-particularly ultrasound and MRI-in detecting rare gastrointestinal duplications in adults, and supports minimally invasive resection as a safe and effective treatment strategy.