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        60例食管癌適形放療臨床療效分析

        2014-11-12 17:45:03陳育標(biāo)
        中外醫(yī)療 2014年1期
        關(guān)鍵詞:臨床療效

        陳育標(biāo)

        [摘要] 目的 探討分析食管癌患者適形放療方法與臨床治療效果。方法 對(duì)該院收治的60例食管癌患者行三維適形放射治療(A組),選取同期60例行常規(guī)放療的食管癌患者(B組),對(duì)比分析二組臨床治療效果。結(jié)果 A組患者甲級(jí)、乙級(jí)占比顯著高于B組,差異有統(tǒng)計(jì)學(xué)意義(P<0.05);A組1、2、3年的局部控制率分別為74.3%、63.1%與46.5%,生存率分別為68.0%、57.8%與45.1%,三年的局部控制率與生存率均顯著高于B組患者,差異有統(tǒng)計(jì)學(xué)意義(P<0.05);兩組患者放療不良反應(yīng)率對(duì)比,差異無統(tǒng)計(jì)學(xué)意義(P>0.05)。結(jié)論 對(duì)食管癌患者采用三維適形放射法進(jìn)行治療,能有效提高患者的近期療效水平,提高局部控制率與生存率,產(chǎn)生的臨床效果顯著,值得臨床上進(jìn)一步研究與推廣。

        [關(guān)鍵詞] 食管癌;適形放療;臨床療效

        [中圖分類號(hào)] R7 [文獻(xiàn)標(biāo)識(shí)碼] A [文章編號(hào)] 1674-0742(2014)01(a)-0007-02

        Analysis of the Clinical Curative Effect of Conformal Radiotherapy on 60 Cases of Oesophagus Cancer

        CHEN Yubiao

        Jieyang People's Hospital, Jieyang, Guangdong Province, 522000, China

        [Abstract] Objective To investigate and analyze the method of conformal radiotherapy for patients with oesophagus cancer and its clinical curative effect. Methods 60 cases of oesophagus cancer sufferers underwent three-dimensional conformal radiotherapy in our hospital were selected as A set, and other 60 cases underwent conventional radiotherapy during the same period were selected as B set. The clinical treatment effect was compared and analyzed between two sets. Results The ratios of first grade and second grade in A set were higher than those in B set, the difference was statistically significant (P<0.05). The partial control rate of A set in 1, 2 and 3 years was 74.3%, 63.1% and 46.5% respectively, the existence rate was 68.0%, 57.8% and 45.1% respectively. The partial control rates and existence rates of three years in A set were much higher than those in B set, the differences were statistically significant (P<0.05). The adverse reactions between two sets of sufferers showed no significant difference (P>0.05). Conclusion For suffers of oesophagus cancer, three-dimensional conformal radiotherapy can effectively improve the short-term curative effect, partial control rate and existence rate with remarkable clinical effect, which is worthy of further study and promotion in clinical practice.

        [Key words] Oesophagus cancer; Conformal radiotherapy; Clinical curative effect

        揭陽市是我國(guó)食管癌高發(fā)區(qū)之一,目前,隨著人們生活飲食方式的變化以及環(huán)境的污染,食管癌的發(fā)病率逐年升高,對(duì)患者的身體健康水平產(chǎn)生嚴(yán)重影響[1]。有研究[2]顯示,采用三維適形放射治療方法可以顯著提高患者的局部控制率與生存率,臨床效果顯著。為探討分析食管癌患者適形放療方法與臨床治療效果,該院對(duì)2011年6月—2013年1月期間收治的食管癌患者,分組進(jìn)行三維適形放射治療與常規(guī)放射治療,對(duì)比分析二者的臨床療效,取得較顯著的研究結(jié)果,現(xiàn)報(bào)道如下。

        1 資料與方法

        1.1 一般資料

        選取該院收治的60例食管癌患者行三維適形放射治療,設(shè)為A組,同時(shí)選取同期60例行常規(guī)放療的食管癌患者,設(shè)為B組,兩組120例患者,男性與女性的例數(shù)分別為90例與30例,年齡范圍為41~79歲,平均年齡為(61.28±3.85)歲。該研究選取的對(duì)象均為首次進(jìn)行放射治療患者病變狹窄程度為Ⅲ度以上,按照食管癌臨床分期標(biāo)準(zhǔn),T1期10例,T2期20例,T3期15例,T4期15例;N0期28例,N1期22例,N2期10例;I期20例,Ⅱ期18例,Ⅲ期12例,Ⅳ期10例。食管癌病變位置于頸段10例、胸上段12例、胸中段23例、胸下段15例。所有病例均取得病理確診均為鱗癌,其中低分化32例、中分化16例、高分化2例。

        1.2 方法

        B組60例患者按照常規(guī)放射治療操作標(biāo)準(zhǔn)進(jìn)行治療,A組60例患者行三維適形放射治療,具體方法如下。

        經(jīng)真空體模固定,使用GE Brightspeed 16排螺旋CT定位,從患者中頸開始直至肋膈角部位,每層厚度為5mm,模擬定位完成后,于重建的圖畫上勾勒出靶區(qū),并畫出臨床靶體積(CTV)、計(jì)劃靶體積(PTV)、腫瘤體積(GTV)與腫瘤周圍部位的重要器官、結(jié)構(gòu)。其中,GTV是CT顯示的區(qū)域腫大淋巴結(jié)和原發(fā)腫瘤以及食管造影顯示病變長(zhǎng)度;CTV是GTV上下分別向外放2.0~3.0 cm,左右向外放0.5~0.8 cm;PTV是CTV均勻向外放0.5 cm。限定靶區(qū)處方劑量及周邊重要器官與組織的限量要求,處方劑量包括95%PTV,劑量≤45Gy,雙肺V20<30%。

        1.3 指標(biāo)觀察與療效評(píng)價(jià)

        治療后1個(gè)月隨訪與記錄兩組患者的近期療效,不良反應(yīng)情況以及1、2、3年的局部控制率、生存率。其中,近期療效評(píng)價(jià)方法按照萬鈞食管癌放療后近期療效評(píng)價(jià)標(biāo)準(zhǔn)[3]進(jìn)行評(píng)定,結(jié)果分為甲級(jí)、乙級(jí)與丙級(jí)。

        1.4 統(tǒng)計(jì)方法

        所得的數(shù)據(jù)均采用SPSS17.0軟件進(jìn)行統(tǒng)計(jì)學(xué)分析,組間率的差異對(duì)比采用χ2檢驗(yàn)。

        2 結(jié)果

        2.1 兩組患者近期療效對(duì)比

        A組患者甲級(jí)、乙級(jí)占比顯著高于B組,丙級(jí)占比顯著低于B組,差異有統(tǒng)計(jì)學(xué)意義(P<0.05),見表1。

        表1 兩組患者近期療效對(duì)表[n(%)]

        注:A組*項(xiàng)數(shù)據(jù)與B組相比,*P<0.05,差異有統(tǒng)計(jì)學(xué)意義。

        2.2 兩組患者局部控制率與生存率對(duì)比

        A組1、2、3年的局部控制率分別為74.3%、63.1%與46.5%,生存率分別為68.0%、57.8%與45.1%,3年的局部控制率與生存率均顯著高于B組患者,差異有統(tǒng)計(jì)學(xué)意義(P<0.05),見表2。

        表2 兩組患者局部控制率與生存率對(duì)比表(%)

        注:A組*項(xiàng)數(shù)據(jù)與B組相比,*P<0.05,差異有統(tǒng)計(jì)學(xué)意義。

        2.3 兩組患者治療不良反應(yīng)對(duì)比

        A組患者放療后放射性食管炎、氣管炎等不良反應(yīng)率與B組相比,雖然略有上升,但對(duì)比差異無統(tǒng)計(jì)學(xué)意義(P>0.05),見表3。

        表3 兩組患者治療不良反應(yīng)對(duì)比表[n(%)]

        注:A組*項(xiàng)數(shù)據(jù)與B組相比,*P>0.05,差異無統(tǒng)計(jì)學(xué)意義。

        3 討論

        對(duì)食管癌患者進(jìn)行放射治療后的效果往往不理想,據(jù)有關(guān)研究[4]統(tǒng)計(jì),采用放射治療后患者5年的生存率僅為10.0%左右。導(dǎo)致放射治療失敗的因素主要是由于患者的原發(fā)腫瘤出現(xiàn)殘存[5],治療不徹底,發(fā)生率高達(dá)75%~96%,此外,患者的組織不均勻、常規(guī)放射治療模擬定位困難[6]、放射耐受性有限、治療體位不精確、腫瘤靶區(qū)的照射劑量把握不準(zhǔn)確[7]等因素,亦在不同程度上,導(dǎo)致放射治療效果不顯著,尤其是對(duì)于劑量把握不準(zhǔn)確時(shí),若增加放射劑量,容易導(dǎo)致正常組織受到更多的損傷,嚴(yán)重影響了患者的生存質(zhì)量,死亡率居高不下。而目前隨著放射物理的發(fā)展,臨床上采用的三維適形放射法,能夠有效保護(hù)患者腫瘤周圍的正常組織,更準(zhǔn)確地把握了靶區(qū)處方劑量[8],通過模擬定位,并于重建的圖畫上勾勒出靶區(qū),進(jìn)行科學(xué)的放射治療計(jì)劃的設(shè)計(jì),顯著提高了患者的局部控制,在Singh AK等[9]人的研究中,發(fā)現(xiàn)采用三維適形放射法治療食管癌患者,與常規(guī)放射治療法相比,近3年的生存率與局部控制率,均有明顯的上升(P<0.05),在該文研究結(jié)果中,A組1、2、3年的局部控制率分別為74.3%、63.1%與46.5%,生存率分別為68.0%、57.8%與45.1%,3年的局部控制率與生存率均顯著高于B組患者,差異有統(tǒng)計(jì)學(xué)意義(P<0.05),與其報(bào)道相符[10]。

        在該次三維適形放療過程中,畫出臨床靶體積、計(jì)劃靶體積、腫瘤體積與腫瘤周圍部位的重要器官,這些均有利于合理把握照射劑量,在該組資料研究結(jié)果中顯示,A組患者甲級(jí)、乙級(jí)占比顯著高于B組,差異有統(tǒng)計(jì)學(xué)意義(P<0.05),與相關(guān)報(bào)道[11]相符合,這說明,采用三維適形放射法可以提高患者臨床療效水平;而A組患者放療后放射性食管炎、氣管炎等不良反應(yīng)率與B組相比,雖然略有上升,但對(duì)比差異無統(tǒng)計(jì)學(xué)意義(P>0.05),其中,導(dǎo)致放射性食管炎、氣管炎等不良反應(yīng)率上升的因素可能與三維適形放射法的照射劑量有關(guān),值得進(jìn)一步取證分析,但總體上看,三維適形放射法不會(huì)顯著增加治療不良反應(yīng)的風(fēng)險(xiǎn),這一點(diǎn)在林曉丹等[12]人的研究中亦做出說明,在一定程度上支持了該文研究結(jié)論。

        綜上所述,對(duì)食管癌患者采用三維適形放射法進(jìn)行治療,能有效提高患者的近期療效水平,提高局部控制率與生存率,不會(huì)顯著增加治療不良反應(yīng)的風(fēng)險(xiǎn),產(chǎn)生的臨床效果顯著,值得臨床上進(jìn)一步研究與推廣。

        [參考文獻(xiàn)]

        [1] 王瀾,韓春,張辛,等.食管癌適形放療預(yù)后因素的Cox模型分析[J].中華腫瘤防治雜志,2009,16(1):58-61.

        [2] 祝淑釵,沈文斌,李任,等.三維適形放療食管癌所致放射性肺炎相關(guān)因素分析[J].中華放射醫(yī)學(xué)與防護(hù)雜志,2007,27(2):161-164.

        [3] 何春波,高峰,曹麗君,等.88例食管癌調(diào)強(qiáng)放療結(jié)合252Cf中子后裝治療的臨床觀察[J].中華放射醫(yī)學(xué)與防護(hù)雜志,2008,28(4):385-386.

        [4] 余雯,傅小龍.18FDG PET-CT對(duì)食管癌臨床分期及適形放療計(jì)劃設(shè)計(jì)的影響[J].中華放射腫瘤學(xué)雜志,2007,16(5):365-368.

        [5] 蔣杰,王奇峰,肖澤芬,等.132例食管癌三維適形放療的療效分析[J].中華放射腫瘤學(xué)雜志,2009,18(1):47-51.

        [6] Kole TP, Aghayere O, Kwah J, et al.Comparison of heart and coronary artery doses associated with intensity-modulated radiotherapy versus three-dimensional conformal radiotherapy for distal esophageal cancer[J].International Journal of Radiation Oncology, Biology, Physics,2012,83(5):1580-1586.

        [7] Yamaguchi S, Ohguri T,Imada H, et al.Multimodal approaches including three-dimensional conformal re-irradiation for recurrent or persistent esophageal cancer: Preliminary results[J].Journal of Radiation Research,2011,52(6):812-820.

        [8] Huang SH,Lockwood G,Brierley J, et al.Effect of concurrent high-dose cisplatin chemotherapy and conformal radiotherapy on cervical esophageal cancer survival[J].International Journal of Radiation Oncology, Biology, Physics,2008,71(3):735-740.

        [9] Singh AK,Lockett MA,Bradley JD,et al.Predictors of radiation-induced esophageal toxicity in patients with non-small-cell lung cancer treated with three-dimensional conformal radiotherapy[J].International Journal of Radiation Oncology, Biology, Physics,2003,55(2):337-341.

        [10] AR and omized Controlled Trial of Conventional Fraction and Late Course Accelerated Hyperfraction Three-Dimensional Conformal Radiotherapy for Esophageal Cancer[J].Cell biochemistry and biophysics,2012,62(1):107-112.

        [11] Fakhrian K,Heilmann J,Schuster T, et al.Primary radiotherapy with or without chemotherapy in non-metastatic esophageal squamous cell carcinoma: A retrospective study[J].Diseases of the esophagus,2012,25(3):256-262.

        [12] 林曉丹,石興源,周同沖,等.調(diào)強(qiáng)或三維適形放療聯(lián)合TP方案化療治療局部中晚期食管癌的臨床研究[J].南方醫(yī)科大學(xué)學(xué)報(bào),2011,31(7):1264-1267.

        (收稿日期:2013-11-10)

        [6] Kole TP, Aghayere O, Kwah J, et al.Comparison of heart and coronary artery doses associated with intensity-modulated radiotherapy versus three-dimensional conformal radiotherapy for distal esophageal cancer[J].International Journal of Radiation Oncology, Biology, Physics,2012,83(5):1580-1586.

        [7] Yamaguchi S, Ohguri T,Imada H, et al.Multimodal approaches including three-dimensional conformal re-irradiation for recurrent or persistent esophageal cancer: Preliminary results[J].Journal of Radiation Research,2011,52(6):812-820.

        [8] Huang SH,Lockwood G,Brierley J, et al.Effect of concurrent high-dose cisplatin chemotherapy and conformal radiotherapy on cervical esophageal cancer survival[J].International Journal of Radiation Oncology, Biology, Physics,2008,71(3):735-740.

        [9] Singh AK,Lockett MA,Bradley JD,et al.Predictors of radiation-induced esophageal toxicity in patients with non-small-cell lung cancer treated with three-dimensional conformal radiotherapy[J].International Journal of Radiation Oncology, Biology, Physics,2003,55(2):337-341.

        [10] AR and omized Controlled Trial of Conventional Fraction and Late Course Accelerated Hyperfraction Three-Dimensional Conformal Radiotherapy for Esophageal Cancer[J].Cell biochemistry and biophysics,2012,62(1):107-112.

        [11] Fakhrian K,Heilmann J,Schuster T, et al.Primary radiotherapy with or without chemotherapy in non-metastatic esophageal squamous cell carcinoma: A retrospective study[J].Diseases of the esophagus,2012,25(3):256-262.

        [12] 林曉丹,石興源,周同沖,等.調(diào)強(qiáng)或三維適形放療聯(lián)合TP方案化療治療局部中晚期食管癌的臨床研究[J].南方醫(yī)科大學(xué)學(xué)報(bào),2011,31(7):1264-1267.

        (收稿日期:2013-11-10)

        [6] Kole TP, Aghayere O, Kwah J, et al.Comparison of heart and coronary artery doses associated with intensity-modulated radiotherapy versus three-dimensional conformal radiotherapy for distal esophageal cancer[J].International Journal of Radiation Oncology, Biology, Physics,2012,83(5):1580-1586.

        [7] Yamaguchi S, Ohguri T,Imada H, et al.Multimodal approaches including three-dimensional conformal re-irradiation for recurrent or persistent esophageal cancer: Preliminary results[J].Journal of Radiation Research,2011,52(6):812-820.

        [8] Huang SH,Lockwood G,Brierley J, et al.Effect of concurrent high-dose cisplatin chemotherapy and conformal radiotherapy on cervical esophageal cancer survival[J].International Journal of Radiation Oncology, Biology, Physics,2008,71(3):735-740.

        [9] Singh AK,Lockett MA,Bradley JD,et al.Predictors of radiation-induced esophageal toxicity in patients with non-small-cell lung cancer treated with three-dimensional conformal radiotherapy[J].International Journal of Radiation Oncology, Biology, Physics,2003,55(2):337-341.

        [10] AR and omized Controlled Trial of Conventional Fraction and Late Course Accelerated Hyperfraction Three-Dimensional Conformal Radiotherapy for Esophageal Cancer[J].Cell biochemistry and biophysics,2012,62(1):107-112.

        [11] Fakhrian K,Heilmann J,Schuster T, et al.Primary radiotherapy with or without chemotherapy in non-metastatic esophageal squamous cell carcinoma: A retrospective study[J].Diseases of the esophagus,2012,25(3):256-262.

        [12] 林曉丹,石興源,周同沖,等.調(diào)強(qiáng)或三維適形放療聯(lián)合TP方案化療治療局部中晚期食管癌的臨床研究[J].南方醫(yī)科大學(xué)學(xué)報(bào),2011,31(7):1264-1267.

        (收稿日期:2013-11-10)

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