Abstract
<jats:p>Case: A 1-year-old female patient presented for the workup of a cystic abdominal lesion that was first discovered at 6 to 7 months of life. A first CT scan of the abdomen and retroperitoneal space showed a cystic mass localized nearby the left adrenal gland. Based on these results the patient was referred to our clinic. An abdominal multislice computed tomography (MSCT) was performed later, which could separate the diagnoses of splenic cyst and gastric duplication cyst. On serial ultrasound examinations, the lesion progressively increased in size, and surgical management was undertaken. Histopathological examination confirmed the diagnosis of gastric duplication. Conclusion. The multimodal diagnostic approach allows early identification of this rare pathology, aids the differintial diagnosis in atypical gastric duplication localization cases and allows to determine indications for surgical treatment.</jats:p>