\s=b\The records of 37 patients with lymphoma of the nose and paranasal sinuses in an 18-year period were studied. The symptoms were divided into three categories: (1) local symptoms: obstruction, bleeding, and rhinorrhea; (2) symptoms of invasion of adjacent structures: facial pain and ear fullness; and (3) systemic symptoms: fever, weight loss, and nocturnal sweating. The presence of an intranasal mass was the most common physical finding. Conventional tomography and computed tomography were helpful for diagnosis. Abnormalities were usually disclosed on biopsy specimens from the nose or mouth. As a rule, several sites in the nose and sinuses were involved. An early diagnosis of sinonasal lymphoma and other malignant neoplasms generally allows effective treatment; therefore, the otorhinolaryngologist should be alert for such disease and, if the clinical picture warrants, should add tomography to the diagnostic workup. (Arch Otolaryngol 1983;109:310-312) According to figures for 1978, malignant lymphoma occurred in 25,000 persons and was the seventh most common cause of death in the United States during that year. Although the nasopharyngeal region, as a portion of the "Waldeyer's ring" area, is recognized as a potential pri¬ mary site of lymphoma, actual involvement of the nose and paranasal sinuses is rare.