抄録
In past 13 years 134 cases of cancer of maxillary sinus were treated and in this paper we studied their long-term results retrospectively based on the clinical classifications. Two cases were classified to T1, 36 to T2, 74 to T3 and 22 to T4. Forty-one cases were treated by surgery alone and 93 by the combined methods of surgery, radiation and chemotherapy.
Their long-term results were investigated retrospectively and TNM classification indicated the clinical prognosis satisfactorily. The 5-year-survival rates were 50% in T1and T2, 33.7% in T3 and 9 % in T4V. Among 74 cases of T3, 29 cases which invaded anteriorly showed 52.5% of the 5-year-survival rates and 21.7% in 45 cases which invaded posteriorly.
The results of the present study were as follows:
1) TNM classification corresponded well to the clinical prognosis of each case of cancer of maxillary cancer.
2) Among 74 cases which were classified as T3, 29 cases which invaded anteriorly showed remarkably better prognosis than 45 cases which invaded posteriorly.
From the above mentioned results, we would propose the following new classification in which TNM classification should include the direction of tumor invasion, anteriorly or posteriorly.
