A retrospective analysis of 33 eases of maxillary sinus cancer seen at R.P.M.I. between 1970 and 1979 was performed. The age of the patients ranged from 18–88 years, with a median age of 60.3. The male to female ratio was 2:1.3. Twenty‐seven (81.8%) of the cases were squamous cell carcinomas. Of the 33 cases, there were no cases in Stage 1, 2 cases in Stage 2, 8 and 23 in Stages 3 and 4, respectively. The 5‐year survival among the patients who were available for a long‐term follow‐up was 36.47, (8 of 22). The 5‐year survival was best for Stage 3 disease (75%) and Stage 4, without local and/or distant metastasis (57.14%). No patient with metastasis lived for more than 3 years. While poorer diagnosis could he related to the degree of local involvement and presence of metastasis, it could not be related to site of involvement, previous treatment, histological findings or delay in diagnosis. Correlation of treatment with prognosis is difficult because selection of treatment is based on a variety of factors, including stage of disease and patient acceptance of treatment. Of the 4 patients treated with surgery alone, all 4 survived for 5 years. Of the 8 patients treated with combined surgery and radiation, 4 survived for 5 years and 2 died without evidence of tumor before 2 years. Other treatments were far less