They lye within the esophageal musculature at any level. Three fourths of cysts present in childhood, usually with respiratory or esophageal symptoms. Adults with duplication cysts may become symptomatic if there is acute enlargement of the cyst, usually caused by bleeding or infection. As with leiomyoma, barium studies show a smooth intramural mass extending into the esophageal lumen. Duplication cysts are the second most common cause of benign esophageal masses.
Treatment is surgical enucleation of the cystic mass.