Esophagus or Trachea Cysts
The trachea (windpipe) and esophagus (tube between the mouth and stomach) both develop from the same tissue in a fetus. Occasionally, during development a bubble of tissue or cyst will form on one or the other of these closely alined structures. Because of the common origin, cysts of the esophagus and trachea are frequently discussed together. They are called bronchogenic cysts, esophageal duplication cysts, or foregut duplication cysts.
Although they can cause symptoms, they are usually identified incidentally on a chest X-ray or CT scan done for another reason. Since they can become infected, or grow large or even be something more serious (such as a tumor), an operation is required to remove them. They can frequently be removed using minimally invasive techniques.