Congenital duplications; Gastrointestinal duplication cyst
Gastrointestinal duplication (GD) is a rare congenital anomaly that arises during early embryonic development and may occur anywhere along the gastrointestinal tract, from the mouth to the anus.
The cause of GD remains unclear. The most popular theory is the abnormal recanalization hypothesis. During the sixth week of fetal development, a proliferation of epithelium completely occludes the lumen of the gut, and vacuoles develop within the occluded lumen. Vacuoles coalesce until the lumen of the gut tube is fully recanalized. Duplication may occur due to an abnormal persistence of vacuoles. Other hypotheses include persistent embryologic diverticulum, bronchopulmonary foregut malformations, or intrauterine vascular accidents.
There are two general types of GD. Cystic duplications account for approximately 80% of cases, are spherical in shape, and have no communication with the bowel lumen. Tubular...
References and Further Reading
- Lee, K. N., Kim, S., Jeon, T. Y., Sung, H., Kim, H. S., Kim, D. H., Seo, H. I., Park, D. Y., Jang, H. J., et al. (2010). Complications of congenital and development abnormalities of the gastrointestinal tract in adolescents and adults: Evaluation with multimodality imaging. Radiographics, 30, 1489–1507.CrossRefPubMedGoogle Scholar
- Long, J., Orlando, R. Esophageal duplication. In Sleisenger and Fordtran’s gastrointestinal and liver disease (9th edn, p. 671). Saunders Elsevier.Google Scholar