Concurrent Tislelizumab and Radiotherapy in Newly Diagnosed Extranodal NK/T-cell Lymphoma, Nasal Type

This clinical trial intends to analyze the efficacy of PD-1 inhibitor combined with radiotherapy for newly diagnosed NK/T-cell lymphoma. The investigational product in this clinical trial is tislelizumab, a PD-1 inhibitor.

As a rationale for using PD-1 inhibitors in patients with NK/T-cell lymphoma, their efficacy has been proved several times mostly in patients with relapsed NK/T-cell lymphoma.

Patients with low-stage NK/T-cell lymphoma usually receive high-concentration cytotoxic chemotherapy combined with radiotherapy, with treatment response rates of approximately 60 to 80%, but 80-90% of them experience hematological and non-hematologic toxicities during treatment.

Therefore, this study intends to determine the efficacy and safety of PD-1 inhibitor(Tislelizumab) combined with radiotherapy as a first-line therapy compared with pre-existing cytotoxic chemotherapy combined with radiotherapy in patients with NK/T-cell lymphoma with low stage and International Prognostic Index.