The neck mass caused by nasopharyngeal carcinoma, also known as metastatic lymph nodes in the neck, has the following characteristics: First, it is mainly distributed in the lymph nodes in the internal jugular vein area, which is manifested as enlarged lymph nodes around sternocleidomastoid muscle. Secondly, the lymph nodes can appear to be active in the early stage, and once the lymph nodes are enlarged and fixed, the number of lymph nodes can be single or multiple, with progressive enlargement, and the clinical anti-inflammatory treatment has no effect. Thirdly, when lymph nodes are in the late stage, they are mostly adherent to the surrounding tissues, such as surrounding blood vessels, muscles and nerves. Fourthly, some patients with metastatic lymph node cancer in the neck can find the primary focus, which is in the nasopharynx, while some patients with metastatic lymph node cancer in the neck cannot find the primary focus, such as submucosal nasopharyngeal cancer which is not so easy to find.