Discussion of Esophageal duplication
- Duplications of the esophagus are the second most common duplications of the gastrointestinal tract after those of the ileum.
- The duplicated segment has a thick wall of smooth muscle and is lined with alimentary tract mucosa. The lining mucosa may be the same as that in the segment it parallels, or it may be similar to that in some other portions of the alimentary tract, frequently gastric mucosa, in which case peptic ulceration of the duplication is a common finding.
- In the newborn and infant, symptoms are due to pressure on the adjacent lung or esophagus, leading to respiratory difficulties or dysphagia and vomiting.
- Complete duplication is a rare malformation, often associated with gastric duplication.
- Differential diagnosis includes any posterior or middle mediastinal mass, such as a neoplasm arising from the sympathetic chain, bronchogenic cysts, neurenteric cysts, pulmonary sequestration, anterior meningocele, and hemangioma.
 Imaging Findings for Esophageal duplication
- Most often, duplications are spherical cysts that rarely make an impression on the esophagus and are usually located in the right hemithorax.
- On plain chest radiographs, they are usually seen as posterior mediastinal masses.
- In cystic esophageal duplication, the esophagogram shows the esophagus to be displaced to the side opposite the cystic mass or an intramural extramucosal mass.
- At CT, a duplication is sharply marginated, has a homogeneous near-water density, and is not enhanced after intravenous contrast material injection.
- At MR imaging, most duplications have low signal intensity on T1-weighted images and high signal intensity on T2-weighted images.
 See Also
 External Links
 References for Esophageal duplication
- Teresa Berrocal, Carmen Madrid, Susana Novo, Julia Gutiérrez, Antonia Arjonilla, and Nieves Gómez-León. Congenital Anomalies of the Tracheobronchial Tree, Lung, and Mediastinum: Embryology, Radiology, and Pathology. RadioGraphics 2004 24: 17e.