Nasopharyngeal cancer is a malignant tumor in otolaryngology, which can be divided into stages I, II, III and IV, as follows: 1. Stage I tumor is mainly in the nasopharynx, with no metastasis elsewhere, and the lesion is very limited and can be confined to the nasopharyngeal roof, posterior wall or pharyngeal fossa, etc. 2. Stage III is when the lymph nodes on one side of the neck are enlarged and larger than 6 cm, or the tumor has metastasized to the contralateral lymph nodes, which has led to the invasion of the surrounding bones or sinuses. In the most advanced stage, the tumor has metastasized to the supraclavicular lymph nodes, and distant lung and liver metastases have occurred.