Tumors of the chest are divided into four categories according to their anatomical parts: lung tumors, mediastinal tumors, and of course, the esophagus itself is also part of the mediastinum, but it has more cases, so it is classified as a separate category, and chest wall tumors are divided into four categories. There are more types of mediastinal tumors, such as thymoma, lymphoma, bronchial cyst, pericardial cyst, lipoma, germinal tumors, teratoma, neurogenic tumors, etc.