A Case of Omphalomesenteric Cyst in Abdominal Wall Forming a Pseudocyst

Abstract

We present a rare case of a 1-year-old girl with an omphalomesenteric cyst forming a pseudocyst. She presented with a supraumbilical swelling that increased gradually. Computed tomography and echography revealed an abdominal wall cyst (4 cm in diameter) with a polypoid lesion (1 cm in diameter) in the bottom of the cyst, suggesting an omphalomesenteric cyst in the abdominal wall. When the cyst was surgically removed, the wall of the cyst was found to have strongly adhered, and the border was unclear. The amylase level of the fluid in the cyst was elevated (12,362 IU/ l). Histopathological examination showed that the cyst wall consisted of fibrous, muscular, and adipose tissues, and the polyp in the cyst consisted of intestinal mucosa and pancreas tissue. The definitive diagnosis was an omphalomesenteric cyst in the abdominal wall forming a pseudocyst. Her postoperative course was uneventful, and no recurrence was noted two years after the operation.