Neonate with a Large Abdominal Cyst: Case Report and Review

Abstract Gastrointestinal duplication is a rare abnormality of the embryological development of the gastrointestinal tract, with an estimated incidence of 1/10,000 in live births and 1/4,500 in neonates and fetuses. It can appear in any portion of the intestinal tract, with the ileum being the most common location. A 5-day-old patient with a prenatal diagnosis of megacolon or mesenteric cyst was diagnosed during antenatal follow-up. A cystic mass attached to the terminal ileum was found approximately 5 cm from the ileocecal valve, which was resected and classified as Type 1B intestinal duplication according to the Long classification. Diagnosis is suggested by abdominal X-rays, ultrasonography, and computerized axial tomography scan with contrast studies, but the definitive diagnosis is made by histopathological examination of the surgical specimen. Key Words: Child; Neonate; Intra-abdominal cyst; Enteric duplication.