Sinonasal T/NK lymphomas are distinct clinicopathological category of extranodal head and neck lymphomas.In Europe and America,the incidence of sinonasal malignant lymphomas was 1.5% in all lymphomas,2.2% in extranadal lymphomas;And in Asia,the incidence was hegher than that in Eurepe and America.Some references confirmed that those lymphomas have immunophenotype of T-lymphocyte/natural killer cell,for this reason,its named as T/N lymphomas.In this paper,the references of immunophenotype,clinicopathogenical feature,diagnosis and management of sinonasal T/N lymphomas were reviewed