Gastric duplication cyst

Case contributed by Augusto César Vieira Teixeira
Diagnosis certain


Onset of nonbilious vomiting and a palpable mass.

Patient Data

Age: newborn
Gender: Female

Abdominal plain radiography shows a large soft tissue circumferential mass displacing the bowel to the left.


Ultrasound reveals a cystic mass with the double wall sign (inner echogenic layer and an outer hypoechoic layer).


MRI T2-weighted sequence demonstrates a cystic mass with close contact with the gastric pylorus.


 The Photomicrograph shows histopathologic features that are characteristics of a gastrointestinal duplication: an inner smooth muscle layer and an outer atrophic gastric mucosal lining.

Intraoperative picture: duplication cyst between the gastric antrum and duodenum.

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