DOI: https://doi.org/10.36347/sjmcr.2025.v13i10.010

Pages: 2224-2226

Duodenal duplication cysts are congenital gastrointestinal anomalies characterized by a cystic structure contiguous with the duodenum and lined by gastrointestinal epithelium, often sharing a common muscular wall. Ultrasonography is the first line imaging modality, demonstrating a well circumscribed cyst with a double layered wall, consisting of an echogenic mucosal layer and a hypoechoic muscular layer, sometimes containing fine echogenic debris. Computed tomography provides complementary evaluation, delineating cyst wall thickness, anatomical relationships with the duodenum and adjacent organs, mass effect, and associated pericystic fluid. These imaging features are pathognomonic and crucial for differentiating duplication cysts from other cystic abdominal lesions. We report the case of an 11-day old female neonate presenting with an epigastric and right paramedian abdominal mass, in whom ultrasonography established the diagnosis of a duodenal duplication cyst.