口腔領域悪性腫瘍の臨床病理学的研究 : 第6報: 下顎歯肉癌について

概要

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We conducted a clinico-pathological analysis on 26 primary cases of lower gum cancer at the clinic of the Oral Surgery Department of Ryukyus University Hospital. The results of the present study were as follows: 1)M can age of the series was 65.8 years. Of 26 lower gum cancers, 18 cases were male and 8 were female. 2) Cases treated by irradiation (R) were 15, treated by irradiation and surgery (R+S) were 11. 3) Clinically, T 4 cases and Stage 4 cases were most frequently encountered. The survival rate of high stage cases and advanced cases were lower than those of low stage ones and those of non-advanced ones. Radiologically, endophytic type (invasive type or deep erosive type) was related to poor prognosis. 4) Histologically, there were 9 cases (34.6%) of well differentiated type and 15 cases (57.7%) of moderately differentiated type. Cases of well differentiated type had good prognosis. Regarding the mode of cancer invasion, cases of type 3 (no distinct borderline) were most frequently encountered. Cases of type 3 (no distinct borderline) and type 4 D (diffuse invasion) had poor prognosis. 5) The 5 year cumulative survival rate in each therapy was 32.0%(R), 81.8%(R-FS), and the overall 5 year survival rate was 55.7%.