Mediastinal cysts may deteriorate, and the more common ones are bronchial cysts, esophageal cysts and pericardial cysts, and esophageal cysts may also be called enterogenic cysts. Benign mediastinal tumors and cysts do not have any obvious symptoms in the early stage because they grow slowly towards the thoracic cavity, but as the tumor grows slowly, it will cause chest tightness and chest pain, and it will also stimulate and compress the respiratory system, nervous system and even the whole surrounding large blood vessels and esophagus, producing a series of tumor-like symptoms. Therefore, even if benign tumors or mediastinal cysts are found without symptoms, surgery is recommended.