Nasopharyngeal carcinoma is a relatively common type of malignant tumor in the head and neck region. If it is stage IV nasopharyngeal carcinoma, achieving clinical cure is very difficult; only a small portion of patients have the chance to achieve clinical cure, as stage IV nasopharyngeal carcinoma is considered advanced. The current common treatments are a combination of radiotherapy and chemotherapy. During the treatment process, regular reviews are necessary to observe the effects of the treatment. Some patients respond well to the treatment, and the tumor can be completely eliminated after treatment; however, for some patients, the treatment can only control the rapid growth of the tumor, not completely eradicate it. Even if the tumor completely subsides, there might still be a chance of local recurrence or distant metastasis after the treatment ends.