Adjuvant Sintilimab Plus Capecitabine in Nasopharyngeal Carcinoma

This randomized clinical trial determining whether Sintilimab plus Capecitabine versus Capecitabine alone can improve the progression-free survival rate of NPC patients with unfavorable response to induction chemotherapy. Patients whose plasma EBV DNA\> 0 copy/mL or SD/PD according to RECIST1.1 after two cycles induction chemotherapy will have concurrent chemoradiotherapy. MRI, CT and EBV DNA will be assessed before the end of radiotherapy. After concurrent chemoradiotherapy, eligible patients will be randomized to receive either adjuvant Sintilimab plus Capecitabine or Capecitabine alone.