RESUMO
Malignant lymphomas represent one of the most important problems of modern medicine, with a constant increase in the last decades, becoming the most frequent tumor among young people. Sinonasal localization is a particular site of malignant lymphomas, representing the second most frequent among ear, nose and throat (ENT) tumors. In this paper, authors present the clinical, diagnostic and therapeutic aspects of a malignant sinonasal lymphoma, which despite an aggressive histological subtype and important regional extension had a favorable clinical outcome. The patient presented to the ENT specialist with an important deformity of the nasal pyramid developed in the last two months. The anatomopathological exam and immunohistochemical analysis were conclusive for non-Hodgkin's lymphoma. The therapeutic course was cytostatic chemotherapy (in spite of the surgical approach) with beneficial oncological outcomes, which determined complete remission of the tumor. Computed tomography (CT) scan revealed a nasoethmoidal tumor with destruction of the nasal pyramid.