Lymphatic hilar not seen is not necessarily malignant. Lymphatic hilum is a normal structure of the lymph node and is located in the central part of the lymph node. Lymph node inflammation and lymphatic tuberculosis can also cause lymphatic hilar failure. 1. Lymphadenitis: The lymph nodes are infected by localized inflammation, which causes the lymph nodes to become enlarged, resulting in the narrowing of the lymphatic vessels, which eventually disappear. 2. Lymphatic tuberculosis: Mycobacterium tuberculosis invades the lymph nodes and destroys part of the corticomedullary structure of the lymph nodes, resulting in unclear structural layers and unseen lymphatic vessels. There may be other reasons that cause the lymphatic vessels to disappear. It is recommended to go to the hospital in time, improve the examination, clarify the cause of the disease, and carry out standardized treatment under the guidance of the doctor.