Abstract
A 50-year-old female complained of swelling of the right upper eyelid and slight exophthalmus. She was treated with surgical excision and irradiation and has shown no recurrence. The authors review the treatment and prognosis of malignant lymphoma of the paranasal sinuses, especially of the frontal sinus. Combined therapy showed the best results, but the prognosis is not favorable. It is concluded that the patients with non-Hodgkin's lyphoma in the frontal sinus should be followed up carefully.