NK/T Cell-Lymphomas type nasal is an aggressive non Hodgkin Lymphoma that destroys the palate and nasal anatomy. The incidence in the US and Europe is very low, however, Asia and South America have reported up to 5-15% of lymphomas in some countries. This study intended to assess the incidence of this type of lymphomas; outcomes of efficacy of treatments; and also to search demographic, clinical and biological characteristics associated with poorer outcomes, in our institution.