摘要目的 探讨影响食管磷癌放疗的预后因素.方法 回顾分析2004--2007年本科非手术并采用CT模拟定位及三维适形放疗的131例Ⅰ～Ⅲb期食管磷癌患者资料和影响预后因素.放疗采用6 MV X线,靶区剂母60Gy分30次6周完成.结果 随访率为100%.单因素分析结果 显示原发灶大体肿瘤体积(GTV)≤40 cm3和>40 cm3的1、2、3年局部控制率分别为71%、64%、60%和43%、32%、28%(x2=13.16,P=0.000).T1+2期和T3期及T4期的分别为67%、59%、59%和62%、53%、50%及41%、28%、19%(X2=13.25,P=0.001).GTV≤40 cm3和>40 cm3的1、2、3年生存率分别为78%、53%、46%和45%、27%、7%(X2=21.55,P:0.000),T1+2期和T3期及T4期的分别为71%、50%、39%和68%、45%、25%及36%、18%、15%(X2=14.35,P=0.001),原发灶肿瘤长度≤5cm和>5 cm的分别为75%、50%、44%和53%、35%、18%(X2=5.99,P=0.014).多因素分析结果 显示GTV、T分期均影响局部控制率(X2=7.07,P=0.008;X2=6.63,P=0.036),而生存率仅与GTV有关(X2=15.82,P=0.000).结论 食管鳞癌GTV可作为显著影响预后的独立因素,GTV越大者预后越差.

abstractsObjective To evaluate the impact of gross tumor volume(GTV)on prognosis of three-dimensional conformal radiotherapy(3DCRT)in esophageal carcinoma.Methods From Jan.2004 to Oct.2007,131 stageⅠ-Ⅲb patients with unreseetable esophageal carcinomas who received 3DCRT with 60 Gy/ 30f/6w were analyzed retrospectively.The effectiveness of related prognostic factors on survival was evaluated by univariate and multivariate analyses.Results The following-up rate was 100%.By univariate analysis,the 1-,2-and 3-year local tumor control rates were 71%,64%and 60%for patients with GTV volume≤40 cm3,and 43%,32%and 28%for those with GTV volume>40 cm3(X2=13.16,P=0.000).respectively.The 1-,2-and 3-year local tumor control rates were 67%,59%,59%for T1+2 patients,62%,53%,50%for T3 patients,and 41%,28%,19%for T4 patients,respectively(X2=13.25,P=0.001).The 1-,2-and 3-year survival rates were 78%,53%,46%for patients of GTV volume≤40 cm3 and 45%.27%and 7%for patients of GTV volume>40 cm3(X2=21.55,P=0.000).The 1-,2-and 3-year survival rates were 71%,50%and 39%for patients with T1+2,68%,46%and 25%with T3,and 36%,18%and 15%with T4,repectively(X2=14.35,P=0.001).The 1-,2-and 3-year survival rates for patients with tumor length≤5 cm were 75%,50%and 44%,compared with 53%,35%and 18%with tumor length>5cm(X2=5.99,P=0.014).By multivariate analysis,GTV volume and T stage were likelv to be independent prognostic factors for local tumor control rates(X2=7.07,P=0.008;X2=6.63,P=0.036).Only the GTV volume was associated with the overall survival rate(X2=15.82,P=0.000).Conclusions GTV volume is independent prognostic factor.The larger the GTV volume is,the worse the prognosis will be.