Objective:To explore the clinical characteristics and treatment effect of primary sinonasal T/NK lymphomas.Methods:Sixteen cases of primary sinonasal T/NK lymphomas were reviewed retrospectively.Results:The clinical symptoms of these patients included nasal obstruction

epistaxis

nasal discharge

fever etc

of which misdiagnosis was often found clinically.The prognosis of patients of higher stage and higher malignancy was bad.Conclusion:Sinonasal T/NK lymphomas are a distinct clinicopathological category and the clinical symptoms are noncharacteristic.We should pay attention to the distinction and promote the knowledge of this disease to avoid misdiagnosis.The prognosis is related to pathological category and clinical stage.