2. Radiation therapy destroys cancer cells with high-energy ionizing radiation and prevents cancer cells from growing and dividing in such a way so as to control cancer. Radiation therapy diet is a kind of localized treatment, which only affects the local cells and feels like taking X-ray, and there will not be any radioactive substances in the body after irradiation.
3. When radiation is administered, the physician will make a thermoplastic surface mold of the head and neck to hold it in place. Irradiation every time is generally 5 to 15 minutes, the frequency and number of irradiation is based on the patient's disease. With high sensitivity to radiation therapy, early and middle stage cases can be followed by curative radiotherapy, and late stage cases can be appropriately treated with palliative radiotherapy. Chemotherapy has certain near-term curative effect on nasopharyngeal carcinoma, and patients with middle and late stage often apply radiotherapy and chemotherapy together, such as neoadjuvant chemotherapy, radiotherapy and adjuvant chemotherapy at the same period, and chemotherapy is the main treatment for those who have distant metastasis in late stage cases. Commonly used chemotherapy regimens include PF, CF+5-FU+DDP, with an effective rate of about 90%, and other regimens such as PFB, PMB, PFA, CBF, and CAB. Surgical treatment is only applicable to cases that are insensitive to radiation therapy (hyperfractionated) and residual or recurrent after radiation therapy.