Ⅱ期和Ⅲ期直肠癌根治术后卡培他滨同期放化疗疗效及失败原因分析

目的 分析Ⅱ、Ⅲ期直肠癌根治术后卡培他滨同期放化疗Ⅱ期临床研究结果.方法 2005-2007年间共131例病理诊断明确的Ⅱ、Ⅲ期直肠癌患者纳入研究,所有患者均接受根治术后同期化放疗和辅助化疗.治疗方案为全盆腔放疗50 Gy分25次,放疗期间同期应用卡培他滨1600mg/m2,每天分2次服用,连用2周停l周.结果 同期放化疗期间3+4级不良反应发生率为28.2％.随访率为93.9％,3年总生存率、无局部区域复发生存率和无远处转移生存率分别为85.1％、96.7％和79.5％.共31例出现复发,包括5例局部区域复发和28例远处转移.单因素分析提示病理低分化或中低分化、未接受辅助化疗、ⅢC期和淋巴结阳性率＞30％是影响总生存的因素(x2=15.49、15.85、8.80和9.76,P=0.000、0.000、0.011和0.002),ⅢC期、未接受辅助化疗和淋巴结阳性率＞30％是影响无远处转移生存的因素(x2 =6.51、11.57和9.70,P=0.034、0.001和0.002).但未接受辅助化疗者中病理为低分化或T4期的患者更多(x2 =7.20、6.48,P=0.027、0.039).结论 Ⅱ、Ⅲ期直肠癌根治术及卡培他滨同期放化疗后局部区域控制率高,远处转移是主要失败原因.

Outcome of locally advanced rectal cancer patients treated with radical surgery followed by concurrent capecitabine and radiotherapy

Objective To evaluate the toxicities and long-term survival of a pilot study of radical surgery followed by concurrent capecitabine and radiotherapy for stage Ⅱ/Ⅲ rectal cancer patients.Methods From March 1,2005 to December 31,2007,131 pathologically proved stage Ⅱ and Ⅲ rectal cancer patients received radical surgery followed by chemoradiotherapy and adjuvant chemotherapy.Capecitabine was delivered daily in twice,for 2 weeks followed by a 2nd cycle after a rest of 7 days during radiotherapy,with the dosage of 1600 mg/m2/d.Three-dimensional conformal radiotherapy was encouraged to the dose of 50 Gy in 25 fractions,and Oxaliplatin/5-fluorouracil or leucovorin based adjuvant chemotherapy was recommended.Results Grade 3 +4 toxicities during concurrent chemoradiotherapy were observed in 28.2％ of patients.The follow-up rate was 93.9％.The 3-year overall survival (OS),locoregional-free survival and distant metastasis-free survival rates were 85.1％,96.7％ and 79.5％,respectively.Among the 31 patients with relapse,5 had loco-regional recurrence and 28 had distant metastasis.Univariate analysis indicated that patients with low and moderate-low differentiated adenocarcinoma,no adjuvant chemotherapy,stage ⅢC disease or positive lymph node ratio (LNR) more than 30％ had lower OS ( x2 =15.49,15.85,8.80 and 9.76,P ＝ 0.000,0.000,0.011 and 0.002 ).Patients with N2 disease had more loco-regional recurrence.Patients with stage ⅢC,without adjuvant chemotherapy,or LNR more than 30％ were at higher risk of distant metastasis ( x2 =6.51,11.57 and 9.70,P =0.034,0.001 and 0.002 ).However,patients who didn ' t receive adjuvant chemotherapy were likely to have low differentiated adenocarcinoma and T4 stage disease ( x2 =7.20,6.48,P =0.027,0.039).Conclusions After radical surgery and concurrent eapecitabine and radiotherapy for stage Ⅱ/Ⅲ rectal cancer patients,loco-regional recurrence rate is pretty low.Distant metastasis is the main treatment failure.