Symptoms of a long lymph node in the thymus may include fever, fatigue, loss of appetite, night sweats, weight loss, or corresponding symptoms of compression and invasion of the surrounding tissues by the enlarged lymph node. Normal thymic lymph nodes are not shown in imaging examination, which usually refers to the enlarged thymic lymph nodes caused by infection, tuberculosis or tumor, etc. The symptoms are mainly related to the causes of enlarged lymph nodes. 1. Enlarged thymic lymph nodes caused by infection or tuberculosis: the enlarged lymph nodes are usually small in diameter, and the symptoms are usually non-specific, such as fever, night sweats, fatigue, loss of appetite, weight loss, etc. 2. Lymph node enlargement of thymus caused by tumor: such as lymph node enlargement caused by aggressive thymoma, thymic carcinoma, non-Hodgkin’s lymphoma or metastatic tumor, etc., the lymph node diameter is large, and its symptom can be manifested as the symptom of compression and invasion of the surrounding tissues, and according to the different parts of the compressed area, it can appear difficulty in swallowing, chest pain, chest tightness, coughing, pleural effusion, phrenic nerve paralysis and so on. Thymus long lymph nodes, it is recommended to go to the hospital for further diagnosis and treatment, to clarify the cause of the disease, to avoid delay.