Purpose: The duplication of gastrointestinal tract has been known to be a rare condition and two different forms, cystic and tubular type. This study was conducted to examine its clinical characteristics, especially cystic enteric duplication which was detected antenatally or postnatally. Methods: There were 13 patients, who confirmed as cystic enteric duplication after operation between July 1996 and June 2015. Clinical data, including a gender, age at operation, presenting symptoms, diagnostic modalities, locations of lesion, and results of surgical treatment, were reviewed retrospectively according to cases detected antenatally and postnatally. Results: Five cases were included in antenatal diagnosis group and 8 cases in postnatal diagnosis group. Both groups show slightly common in female and the lesion most common in ileum. Antenatal diagnosis group shows 2 males and 3 females and the mean age at operation was 12±52 days (range, 5 to 90 days). They received operation regardless of symptom. Postnatal group shows 3 males and 5 females and the mean age at operation was 462.5±777.0 days (range, 4 days to 6 years). Moreover, 6 patients (75.0%) were age before 2 years. They usually presented abdominal pain with vomiting. Conclusion: Cystic enteric duplication could present symptoms at any time during childhood, mainly before 2 years old, and so a proper management should be considered when suspect it. Although it is uncommon, surgical management including a minimal invasive procedure could be attempted despite the neonatal period.