The extranodal T/NK-cell nasal type occurs in middle-aged men, and often compromises the aerodigestive tract with nonspecific initial symptoms such as rhinorrhea, nasal obstruction and epistaxis. We report the case of a 43-year-old male with snoring, apneas, drowsiness and impaired concentration, nasal obstruction and rhinorrhea. The cardiorespiratory polygraphy confirmed severe obstructive sleep apnea syndrome. Flexible nasofibroscopy showed an irregular tumor in nasopharynx; while the tomography also concluded with the presence of lymphadenopathy in level I, III and III. Nasopharyngeal biopsy showed extranodal T/NK-cell nasal type, continuing with chemotherapy and radiotherapy.