Extranodal natural killer T-cell lymphoma, nasal-type: a prognostic model from a retrospective multicenter study.

Patients with natural killer T (NK/T) -cell lymphomas have poor survival outcome, and for this condition there is no optimal therapy. The purpose of this study was to design a prognostic model specifically for extranodal NK/T-cell lymphoma, which can identify high-risk patients who need more aggressive therapy.