放射治疗83例宫颈癌预后的相关因素

Prognostic factors in 83 patients with cervical carcinoma treated with high-dose-rate brachytherapy and external radiotherapy

目的 :探讨放射治疗宫颈癌预后的相关因素 ,着重从肿瘤大小、疗程、局部控制情况等方面分析其与生存率的关系。方法 :83例Ⅰ、Ⅱ、Ⅲ期的宫颈癌于 1993年 4月～ 2 0 0 1年 4月在本科行首次放射治疗 ,全部病例均用60 Co远距离治疗机行盆腔外照射加192 Ir高剂量率后装治疗机行腔内照射。外照射 :中平面剂量DT 2 5～ 2 6Gy/13次后中间挡铅加量至DT 4 8～ 5 0Gy。腔内治疗 :A点的剂量DT 5Gy/次 ,DT 35Gy/ 7次。生存率计算采用Kaplan Meier法 ,差异显著性采用Log rank检验。 结果 :①局部控制情况肿瘤消退的 :一年、二年、三年、五年的生存率分别为 95 87%、77 12 %、73 0 9%、73 0 9% ,肿瘤残留的 :一年、二年、三年、五年的生存率分别为 34 2 9%、0 %、0 %、0 % ,差异有显著性意义 (χ2 =111 75 36 ,P <0 0 0 0 1)。②疗程疗程 <5 6天 :一年、二年、三年、五年的生存率分别为 93 88%、82 86 %、80 19%、80 19% ;疗程≥ 5 6天 :一年、二年、三年、五年的生存率分别为 78 95 %、30 5 5 %、2 2 91%、2 2 91%。差异有显著性意义 (χ2 =2 2 4 115 ,P <0 0 0 1)③宫颈肿瘤最大直径 <4cm :一年、二年、三年、五年的生存率分别为 95 12 %、82 86 %、79 6 7%、79 6 7% ;

Purpose:To investigate the related factors affecting the prognosis of patients with cervical carcinoma treated with radiotherapy. To analyze the relationship between the survival rate and some factors such as the tumor size,treatment days and local control.Methods:From April 1993 to April 2001,83 cervical carcinoma patients with stage Ⅰ,Ⅱ,Ⅲ were treated with cobalt teletherapy and 192 Ir high-dose-rate brachytherapy as primary treatment. The method of external irradiation: first deliver DT25-26Gy/13 fraction,then increase the dose to DT48-50Gy with middle lead block in the field. The internal radiation method: the dose ir A point is DT 35 Gy/7 fraction. Kaplan- Meier method was used to calculate the survival rate and Log-rank test for the difference significance.Results:①local control: the 1-,2-,3-,5-year survival rates in complete response and partial response patients and progressive patients were respectively 95.87%,77.12%,73.09% 73.09%and 34.29%,0%,0%,0%,there is significant difference between them . ②treatment days :the 1-,2-,3-,5-year survival rates in the patients with treatment days exceeding 56 days and not exceeding 56 days were respectively 93.88%,82.86% 80.19%,80.19% and 78.95%,30.55%,22.91%,22.91%,there is significant difference between them . ③the maximum tumor diameter : the 1-,2-,3-,5- year survival rates in patients with the maximum tumor diameter exceeding 4 centimeters and not exceeding 4 centimeters were respectively 95.12%,82.86%,79.67%,79.67% and 81.93%,58.20%,53.35%,53.35%,there is significant difference between them.Conclusions:①The patients with local residual tumor and bigger tumor volume had relatively poorer prognosis;②The treatment days should be shortened to 8 weeks if possible;③ The comprehensive treatment and shortened treatment days may improve the therapeutic effect for the patients with tumor size ≥4cm,local residual and progressive tumor.