Most of the causes of mediastinal lymph node enlargement are mediastinal or mediastinal organs, such as lung or esophagus, trachea malignant tumor, and the symptoms are mainly compression symptoms, as follows: 1. 4. Some mediastinal tumors can compress the recurrent laryngeal nerve, mostly beside the thyroid gland, which is easily compressed by lymph nodes when passing in the mediastinum, and the corresponding symptoms are more serious, such as hoarseness, choking and coughing, and even difficulty in breathing. Mediastinal lymph node enlargement is usually an important condition, and patients must pay attention to it. First of all, the cause of the enlarged lymph nodes should be clarified, whether the enlargement is caused by a tumor or an inflammatory lesion. If the swollen lymph nodes are caused by a tumor, they must be diagnosed and treated in a hospital without carelessness.