Nasopharyngeal cancer review requires the following examinations: 1. Electronic nasopharyngoscopy, which can visually determine whether there is cancer recurrence in the nasopharynx or whether there is local residue after radiotherapy or chemotherapy. 2. EBV serological examination, which can indicate whether there is recurrence of nasopharyngeal cancer at an early stage, as well as blood routine, biochemical function and other related examinations. 3. CT or MRI of the nasopharynx, including enhanced CT or MRI, can determine whether there is recurrence of cancer in the deep part of the nasopharynx, whether there is disappearance of fatty spaces, and even whether there is local vascular invasion, including whether there is enlargement of lymph nodes in the neck, etc. 4. To determine whether there is a possibility of distant metastasis.