The study try to show the weekly cisplatin based CCRT is not inferior to 3-weekly cisplabe based CCRT in terms of 3-yr progression free survival rate in advanced nasopharyngeal carcinoma

Inclusion Criteria:

• histologically confirmed nasopharyngeal carcinoma age of 18 years or over stage II ~ IVb no history of chemotherapy, radiotherapy, or immunotherapy for NPC with measurable lesion based on RECIST 1.1 ECOG PS 0 ~2 good organ function (liver, renal, hematologic)

Exclusion Criteria:

• active infectious disease requiring antibiotics uncontrolled heart disease pregnancy and on feeding state history of other malignancy within 5 years before enrollment, except for well treated non-melanomatous skin cancer, in situ cervical cancer, thyroid cancer