Treatment of portal vein tumor thrombus using ^(125)Iodine seed implantation brachytherapy

We reported two cases of liver metastasis with portal vein tumor thrombus that developed after liver transplantation for hepato cellular carcinoma (HCC). Both the patients were women aged 43 and 55 years, who had liver metastasis and portal vein tumor thrombus formation after liver transplantations for HCC. For the treatment of portal vein tumor thrombus, 125I seeds were implanted into the hepatic tissue under the guidance of preoperative computed tomography (CT) images with a total radiation dose of 130 Gy. Enhanced spiral CT scan was performed for evaluation of the liver at 12 and 16 wk after treatment. Thereafter, upper abdominal CT examination was performed every 2-3 mo. No severe complications associated with the 125I seeds were seen in these two patients. The upper abdominal CT images (obtained after 3 and 4 mo of treatment) showed that the thrombosis reactions were complete reaction and restoration of the patency of the partially obstructed portal vein with partial obstruction. In the case with complete obstruction of the portal vein, the thrombosis was resolved completely, but blood flow could not be restored. After this treatment, one of the patients is stillalive, while the other died within 6 mo after the treatment due to lung metastasis complicated with lung infection, leading to respiratory failure.

Percutaneous biliary stent combined with brachytherapy using 125I seeds for treatment of unresectable malignant obstructive jaundice:A meta-analysis

BACKGROUND Malignant obstructive jaundice(MOJ)is a common pathologic manifestation of malignant biliary obstruction.Recently,several clinical trials have explored the clinical effectiveness of intraluminal^(125)I seed-based brachytherapy for MOJ patients,and various outcomes have been reported.AIM To assess the efficacy and safety of percutaneous biliary stents with^(125)I seeds compared to conventional metal stents in patients with unresectable MOJ.METHODS A systematic search of English-language databases(PubMed,Embase,Cochrane Library,and Web of Science)was performed to identify studies published prior to June 2020 that compared stents with or without^(125)I seeds in the treatment of unresectable MOJ.The outcomes analyzed included primary outcomes(stent patency and overall survival)and secondary outcomes(complications and liver function parameters).RESULTS Six randomized controlled trials and four retrospective studies involving 875 patients were eligible for the analysis.Of the 875 included patients,404 were treated with^(125)I seed stents,while 471 were treated with conventional stents.Unadjusted pooled analysis demonstrated that compared to conventional stents,^(125)I seed stents extended the stent patency time[hazard ratio(HR)=0.36,95%confidence interval(CI)=0.28-0.45,P<0.0001]and overall survival period(HR=0.52,95%CI=0.42–0.64,P<0.00001).Subgroup analyses based on the type of^(125)I seed stent and type of study design showed consistent results.However,there were no significant differences in the occurrence of total complications[odds ratio(OR)=1.12,95%CI=0.75-1.67,P=0.57],hemobilia(OR=1.02,95%CI=0.45-2.3,P=0.96),pancreatitis(OR=1.79,95%CI=0.42-7.53,P=0.43),cholangitis(OR=1.13,95%CI=0.60-2.13,P=0.71),or pain(OR=0.67,95%CI=0.22-2,P=0.47).In addition,there were no reductions in the levels of serum indices,including total bilirubin[mean difference(MD)=10.96,95%CI=-3.56-25.49,P=0.14],direct bilirubin(MD=7.37,95%CI=-9.76-24.5,P=0.4),alanine aminotransferase(MD=7.52,95%CI=-0.71-15.74,P=0.07),and aspartate aminotransferase(MD=-4.77,95%CI=-19.98-10.44,P=0.54),after treatment.Publication bias was detected regarding the outcome overall survival;however,the conclusions were not changed after the adjustment.CONCLUSION Placement of stents combined with brachytherapy using^(125)I seeds contributes to a longer stent patency and higher overall survival than placement of conventional stents without extra complications or severe liver damage.Thus,it can be considered an effective and safe treatment for unresectable MOJ.

Comparison between the Use of Loose and Stranded Seeds in Prostate Brachytherapy in Brazil

Cancer is a leading cause of death worldwide. In 2030, 26.4 million new cases will be diagnosed, with 17 million deaths accounted worldwide. Prostate cancer is the sixth most common type in the world, and the second most commom in men. For Brazil, the number of new cases of prostate cancer in 2010 is estimated to 52,350. Treatment of prostate cancer may be by surgery, radiation or even vigilant observation. A method of radiotherapy which has been extensively used is brachytherapy, where Iodine-125 seeds are placed inside or next to the area requiring treatment. Iodine seeds can be introduced loose seeds or stranded in bioabsorbable polymers in order to increase the dosimetric coverage of the prostate and reducing the chance of seed migration. Data were gathered concerning the commercialization of loose seeds and stranded seeds, between 2005 and 2011, in Brazil. It was noted that the number of stranded seeds commercialized in Brazil (around 80%) has always been much greater than the number of loose seeds, reaching 90% last year. The main reason is the reduction of the seed migration events into other parts of the body, since there is a potential hazard even considering that no harmful effect has been observe. The data regarding dosimetry are still controversial, since the seeds that migrate is normally no more than 1%.

Iodine-125 interstitial brachytherapy for experimental liver cancer

Objective:To study the effect of iodine-125 interstitial brachytherapy on liver cancer. Methods: Animal model of human liver cancer was established by injecting SMMC-7721 cells cultivated in vitro subcutaneously into the flank of BALB/c nude mice. Nude mice with tumor of 5 mm in diameter were randomly divided into 2 groups (n = 10). One iodine-125 seed of apparent activity 0. 8 mCi was implanted into the center of tumor in treatment group, whereas an inactive seed was implanted in control group. The other 20 nude mice with tumor reaching 10 mm in diameter were also treated as above. The size of tumor was determined weekly after implantation, and pathological examination and blood routine were taken on the 28th day. Results: Tumor growth was obviously inhibited in treatment group of tumor of 5 mm in diameter, and there was statistically significant difference in tumor volume between treatment and control groups (P<0. 01). Around iodine-125 seed, apparent necrosis of tumor was shown in treatment group, accompanied by karyopyknosis and reduced plasma in residual tumor cells microscopically. Tumor growth was not inhibited in either treatment or control group of tumor of 10 mm in diameter. There was no obvious adverse effect except for decreased white blood cells in treatment groups. Conclusion: There is certain effect of iodine-125 interstitial brachytherapy on liver cancer, which is associated with the size of tumor.

^(125)I粒子植入在难治性甲状腺癌治疗中的应用价值

作为近距离放射治疗的一种,^(125)I粒子植入已广泛应用于各种不可切除或局部复发的恶性肿瘤治疗中,均展现出良好的治疗效果与前景。由于具有疗效确切、安全微创的特点,^(125)I粒子植入为不能再次手术、^(131)I治疗不可控及不适合靶向治疗的持续或复发甲状腺癌提供了一种可选择的手段。该文将简要介绍^(125)I粒子植入在难治性甲状腺癌局部复发灶及其转移灶治疗和病灶术前定位中的应用。

Three-Dimensional Conformal Dose Planning for Prostate Brachytherapy

For local radiotherapy, a three-dimensional(3D)conformal localized dose planning protocol has been established in this paper to develop a precise and reasonable dose plan. A precalculated 3D dose map for a single source is obtained using the Monte Carlo method, and the spatial dose maps are combined linearly to acquire the dose distribution. The dose distribution is visualized through the real-time display of the isodose line and isodose surface combined with the reconstructed 3D organ groups. By observing 3D dose coverage to the target volume and surrounding tissues, dose planning could be initiated with greater accuracy and precision to avoid dose dead zones and excessively high-dose levels, thus achieving the 3D conformal dose planning objective. Further research into the impact that blockages have on a needle trajectory can be conducted to optimize the insertion accuracy. A treatment planning system was developed to formulate and implement the 3D local treatment plan before the surgery,during the surgery, and after the surgery. Several experiments pertaining to both single-seed and multiple-seed dose distributions were conducted to verify the accuracy of the single-seed dose calculation module and 3D superposition dose calculation in the treatment planning system.

Personalized radioprotection in tumor patients after^(125)I seed brachytherapy

Objective:To investigate patient-specific radioprotection mathods for people in close contact with cancer patientstreated by 12I-seed implantation.Methods:The initial dose rates(D_(0))at distances of 30 and 100 cm from 80 patients who had undergone ^(125)I-seed implantation were measured within 24 h of the procedure.The dose rate at t(D_(t))and effective dose(E)were calculated according to the measurad vales of D.The appropriate precaution times for general adult family members,spouses,coworkers,and children or pregnant women were determined,and the relationships between and precaution time for different close-contact groups were derived by curve-fitting the corresponding data.Results:The mean D vahes of 80 patients at distanes of 30 and 100cm were(15.24±11.25)μSv/h and(1.96±2.63)μSv/h,respectively(P<0.05).The mean values and range of precaution time for general adult familymembers,spouses,coworkers,and children or pregnant women were(4.17±16.55),(102.93±49.22),(51.00±61.29),and(34.27±56.90)d(0-90.61),(0-234.01),(0-247.81),and(0-224.69)d,respectively.Furthemore,a logarithmic relationship betwen D and precaution time(Y)was observed for the different groujps.The equations of these relationships were detemined to be Y=-131.569+83.256 lnD_(0) for general adult family mambers,Y=—108.532+83.318 lnD_(0) for spouses,Y=25.470+83.318 lnD,for coworkers,and Y=2.585+83.229 lnD_(0) for children or pregnant women.Conchusions:Some cancer patients treated by ^(125)I-seed brachytherapy emitover-dose levels of γ-rays,necessitatingradiation protection for their close contacts.However,appropriate patient-specific radiation protection fordifferent close contacts can be determined based on the precaution time calculated using the D_(0) value.

DTI and pathological changes in a rabbit model of radiation injury to the spinal cord after ^(125)I radioactive seed implantation

Excessive radiation exposure may lead to edema of the spinal cord and deterioration of the nervous system. Magnetic resonance imaging can be used to judge and assess the extent of edema and to evaluate pathological changes and thus may be used for the evaluation of spinal cord injuries caused by radiation therapy. Radioactive ^125I seeds to irradiate 90% of the spinal cord tissue at doses of 40–100 Gy （D90） were implanted in rabbits at T10 to induce radiation injury, and we evaluated their safety for use in the spinal cord. Diffusion tensor imaging showed that with increased D90, the apparent diffusion coefficient and fractional anisotropy values were increased. Moreover, pathological damage of neurons and microvessels in the gray matter and white matter was aggravated. At 2 months after implantation, obvious pathological injury was visible in the spinal cords of each group. Magnetic resonance diffusion tensor imaging revealed the radiation injury to the spinal cord, and we quantified the degree of spinal cord injury through apparent diffusion coefficient and fractional anisotropy.

Dosimetry for ^(125) I radioactive seed implantation therapy for hepatocellular carcinoma

Hepatocellular carcinoma （HCC） is an aggressive malignancy. Early lesions respond well to hepatic resection or liver transplantation. However, only a few of HCC patients are suitable for surgical intervention. External beam radiation and chemotherapy is poorly efficacious. In the last 20 years, HCCs belonging to the radiosensitive tumor group has been confirmed. Along with the development of new radiotherapy technology and facilities, the research about brachytherapy（especially ^125I seed implantation therapy） has provoked more interests in the world. Radioactive seed implantation therapy is a form of interstitial brachytherapy, with the property of local ＂conformal radiotherapy＂ and the advantages of minimal invasion, convenience, high performance, and minimal adverse effects. It is a promising therapy for HCC, however the dosimetry hasn＇ t yet been identified and lacks verification in prospective research. This report aims to further explore the best prescription dose and radioactivity for ^125I interstitial implantation brachytherapy for HCC.

Iodine-125 seed implantation in the treatment of malignant tumors

Malignant tumors are major causes of morbidity and mortality in China.Despite advances in surgical,radiological,chemotherapeutic,molecular targeting,and immunotherapeutic treatments,patients with malignant tumors still have poor prognoses.Low-dose-rate brachytherapy,specifically 125I seed implantation,is beneficial because of its high local delivery dose and minimal damage to surrounding tissues.Consequently,it has gained increasing acceptance as a treatment modality for various malignant tumors.In this study,we explored the fundamental principles,clinical applications,and new technologies associated with 125I radioactive seed implantation.

A prospective study:intraoperative ^(125)I radioactive seed implant therapy in advanced esophageal squamous cell carcinoma

Objective： To investigated the role of intraoperative iodine-125 （125I） brachytherapy as a treatment option for advanced thoracic esophageal squamous cell carcinoma （ESCC）. Methods： Using preoperative computed tomography （CT）-based staging criteria, between 2000 and 2008, 298 patients with ESCC （stage Ⅱ-Ⅲ） were enrolled in this prospective study. With informed consent, patients were randomized into two groups： intraoperative ^125^I seed implantation and surgery alone （control group）. Twenty to forty 125I seeds （0.5 mCi per seed）, with a total activity in 10-30 mCi, and a matched peripheral dose （MPD） of 60-70 Gy, were implanted under direct visualization. The surgical procedure used in this study was either a radical resection, which involved an esophagectomy through a left thoracotomy with two-field lymphadenectomy, or palliative resection. The postoperative complications were observed and recorded. The location and quality assessment of J25I seeds were assessed using CT scans or X-ray imaging. The short-term efficacy was evaluated according to WHO criteria. The 1, 3, 5 and 7-year survival rates were determined on follow-up. Results： There was no displacement or loss of 125I seeds. The local recurrence rates in the intraoperative 125I seed implantation group and control group were 14.9% and 38.7%, respectively （P 〈 0.05）. An objective response rate of 92% was observed in the seed implant group, which was significantly higher than 0% in the control group （P 〈 0.05）. There was no significant difference between the two groups when comparing of complications （P 〉 0.05）. The 1-year survival rate of the two groups were not significantly different （P 〉 0.05）. However, the 3, 5 and 7-year survival rates in the united 125I group （64%, 55.3% and 8%, respectively） were statistically different from those in the control group （52%, 29.1% and 1.4%,respectively）（P 〈 0.05）. Conclusion： Intraoperative 125I seed implantation is safe and effective for advanced ESCC. Seed implantation may reduce the local recurrence rate and improve survival in patients with ESCC. The MPD of 60-70 Gy, with single 125I seed activity of 0.5 mCi, is reasonable.

^(125)Ⅰ粒子治疗肺鳞癌术后剂量参数与疗效关系初探

目的探讨肺鳞癌^(125)Ⅰ粒子植入术后各剂量参数与肿瘤体积缩小比的关系,并得出预测疗效的最佳参数。方法回顾性分析2015年1月至2021年3月本院^(125)Ⅰ粒子植入治疗的26例肺鳞癌患者,共28个病灶。所有患者术后即刻行剂量验证,得出术后D_(90)(90%靶体积所接受的最小周边剂量)。术后规律随访,根据患者实际随访时的CT图像计算术后t个月肿瘤体积缩小比(R_(t))、术后1个月肿瘤体积缩小比(R_(1))、初月理论吸收剂量(D_(1m))、初月疗效校正吸收剂量(D_(1e))和初月敏感性校正吸收剂量(D_(1s))。将术后D90与R1进行曲线拟合,将术后D_(90)、D_(1m)、D_(1e)、D_(1s)与R_(t)进行曲线拟合,寻找各参数与肿瘤体积缩小比的关联性。结果术后D_(90)、D_(1m)、D_(1e)、D_(1s)、R_(t)和R_(1)分别为(113.56±27.61)Gy、(35.2±9.8)Gy、(45.8±17.9)Gy、(38.6±20.7)Gy、(34±39)%和(27±27)%。术后D_(90)与R_(1),术后D_(90)、D_(1m)、D_(1e)、D_(1s)与R_(t)均为正相关,关系方程分别为y=0.00001x^(2)+0.0019x-0.1331(R^(2)=0.234)、y=-0.0001x^(2)+0.0292x-1.4459(R^(2)=0.210)、y=0.5222lnx-1.4938(R^(2)=0.161)、y=-0.0004x^(2)+0.0489x-0.9973(R^(2)=0.503)和y=0.3909lnx-1.0304(R^(2)=0.287)。结论术后D_(90)、D_(1m)、D_(1e)、D_(1s)与术后肿瘤体积缩小比呈正相关,可用于预测肺鳞癌^(125)Ⅰ粒子植入患者的疗效,相较于术后D_(90)和D_(1m),D_(1e)与D_(1s)预测疗效可能更优。

^(125)I放射性粒子植入治疗复发性腭部小唾液腺恶性肿瘤7例临床分析

目的:探讨^(125)I放射性粒子植入治疗复发性腭部小唾液腺恶性肿瘤的临床效果。方法:对7例手术+放疗后复发且拒绝二次手术的腭部小唾液腺恶性肿瘤患者进行^(125)I放射性粒子植入治疗,根据患者具体情况制定治疗计划,术中将^(125)I放射性粒子植入设计的靶区组织间,术后视情况戴用赝复体式放射性粒子布源器。定期随访,观察治疗效果及不良反应。结果:7例患者随访17~62个月,均未见肿瘤再次复发,未出现明显3级及以上放射性损伤。随访过程中,1例高龄患者因全身疾病死亡,3例患者出现轻度暂时性不良反应。结论:对于复发的腭部小唾液腺恶性肿瘤,^(125)I放射性粒子植入治疗近期疗效良好,是一种安全、微创、有效的治疗方案。

Similar therapeutic effects of ^(125I) seed radiotherapy andγ-ray radiotherapy on lacrimal gland adenoid cystic carcinoma

AIM:To evaluate the survival outcomes of patients with lacrimal gland adenoid cystic carcinoma who underwent eye-sparing surgery combined with ^(125I)seed implantation radiotherapy or local externalγ-ray radiotherapy.METHODS:In this retrospective comparative case series,the clinical records of 27 primary and 8 recurrent patients were reviewed.Univariate and multivariate analyses were used to identify risk factors associated with distant metastasis(DM),and the overall survival(OS)after the initial surgery was analyzed.RESULTS:The median follow-up after radiotherapy was 36 mo(range 6-120 mo).At the last follow-up after radiotherapy,26(74.3%)patients had no evidence of disease,7(20%)patients had DM,2(5.9%)patients died of DM,and 1 patient with DM was lost to follow-up.Univariate analyses showed that duration of symptoms,bone destruction,T stage classification,and wide excision surgery were risk factors influencing DM(P<0.05).The 5-year and 10-year OS rates after the initial surgery were 95.8%and 79.9%,respectively.The 5-year DM-free survival and disease-free survival rates after radiotherapy were 66.4%and 52.7%,respectively.CONCLUSION:^(125I)seed radiotherapy and local externalγ-ray radiotherapy may have similar therapeutic effects in preventing DM.Patients with T1/T2 stage disease have a better prognosis than those with T3/T4 stage disease.

Relationship between miR-7-5p expression and ^(125)I seed implantation efficacy in pancreatic cancer and functional analysis of target genes

Objective The aim of this study was to investigate the relationship between miR-7-5p expression and intertissue-^(125)I irradiation sensitivity in pancreatic cancer tissues and to analyze the function of target genes.Methods Thirty-seven patients with unresectable pancreatic ductal adenocarcinoma(PDAC)treated with radioactive ^(125)I seed implantation were enrolled.RT-PCR was used to detect the expression level of miR-7-5p in cancer tissues and analyze the relationship between miR-7-5p expression and ^(125)I radiation sensitivity.Bioinformatic software and online tools were used to predict the miR-7-5p target genes and analyze their functional annotation and pathway enrichment.Results Radioactive ^(125)I seed implantation was followed up for 2 months.The objective response rate of the miR-7-5p high expression group was 65.0%(13/20),whereas the objective response rate of the miR-7-5p low expression group was 5.88%(1/17),and the difference between the two groups was statistically significant(χ^(2)=13.654,P<0.001).A total of 187 target genes were predicted using three databases.GO functional annotation showed that target genes were mainly involved in cellular response to insulin stimulus,regulation of gene expression by genetic imprinting,cytosol,peptidyl-serine phosphorylation,bHLH transcription factor binding,cargo loading into vesicles,cellular response to epinephrine stimulus,and nucleoplasm.KEGG pathway enrichment analysis showed that target genes were mainly involved in the ErbB signaling pathway,HIF-1 signaling pathway,axon guidance,longevity regulatory pathway,endocrine resistance,glioma,choline metabolism in cancer,and EGFR tyrosine kinase inhibitor drug resistance.Molecular complex detection analysis by Cytoscape revealed that PIGH,RAF1,EGFR,NXT2,PIK3CD,PIK3R3,ERBB4,TRMT13,and C5orf22 were the key modules of miR-7-5p target gene clustering.Conclusion The expression of miR-7-5p in pancreatic cancer tissues positively correlated with the radiosensitivity of ^(125)I seeds.Via targeted gene regulation,miR-7-5p acts on the network of multiple signaling pathways in PDAC and participates in its occurrence and development.Thus,miR-7-5p may become a predictive index of ^(125)I seed implantation therapy sensitivity in PDAC patients.

^(125)I粒子永久性植入组织间放射治疗肝癌

目的 :探讨12 5I组织间放射治疗肝癌的疗效。方法 :选择肝癌患者 84例 ,随机分为对照组 (A组 )与治疗组 (B组 ) ,A组 4 2例行手术治疗 (根治手术或姑息手术 )和化疗 ;B组 4 2例 ,除施行A组的治疗方案外 ,另行术中永久植入12 5I粒子。结果 :术前、术后 1w及 3个月内血象虽有显著差异 ,但均在正常范围内 ,免疫指标前后变化无统计学意义。A组 :12个月、2 4个月、36个月局部复发率分别为 4 1.7%、5 0 .0 %和 5 9.5 % ;12个月、2 4个月、36个月局部生存率分别为 81.3%、6 3.4 %和 4 7.6 %。B组 :12个月、2 4个月、36个月局部复发率分别为 0、6 .7%和 11.9% ;生存率分别为 94 .7%、87.5 %和 78.4 % ,两组的局部复发率及生存率有显著性差异 (P <0 .0 5 )。结论 :12 5I组织间放射治疗肝癌方法简单、安全 ,近期疗效确切 ,是治疗癌症的理想方法之一。

CT引导下放射性^(125)I粒子置入治疗脊柱转移性肿瘤的价值

目的:探讨CT引导下放射性125I粒子置入治疗脊柱转移性肿瘤的价值。方法:14例无法手术切除或放化疗的脊柱转移性肿瘤患者,均在CT引导下行放射性125I粒子置入术。置入术前应用三维治疗计划系统制定粒子置入计划。术中根据CT影像采取不同置入针排列方式种植粒子,粒子间距0.5～1.0cm。根据肿瘤大小及对放射线敏感程度置入粒子数范围26～145颗,粒子活度范围0.50～0.80mCi。术后即刻复查CT观察粒子分布情况,并再次应用三维治疗计划系统进行剂量验证。结果:14例患者均顺利完成手术。所有病例随访1～75个月,中位随访时间12.0个月。局部有效率50.0%,中位局部控制时间为26.0个月,1年、2年和3年局部控制率分别为62.5%、50.0%和37.5%。中位生存时间11.0个月,1年、2年和3年生存率分别为50.0%、41.7%和20.8%。神经功能保留率和恢复率分别为92.9%(13/14)和71.4%(10/14)。镇痛有效率和疼痛完全缓解率分别为78.6%(11/14)和64.3%(9/14)。结论:CT引导下放射性125I粒子置入治疗脊柱转移性肿瘤安全,并发症少,疗效确切,可作为不宜手术切除或放化疗患者的补充治疗方式。

CT引导下经皮椎体成形术联合^(125)I粒子植入治疗累及椎管的椎体转移瘤23例

目的探讨CT引导下经皮椎体成形术(PVP)联合125I粒子植入治疗累及椎管的椎体转移瘤的安全性和疗效。方法 23例椎体转移性肿瘤患者,累及28节椎体,每例患者受累椎体1~2节,病变涉及颈椎4节、胸椎13节,腰椎11节。均可见椎体后壁破坏,其中12例13节肿瘤侵犯到硬膜外间隙。参照术前治疗计划系统(TPS),CT引导下,颈椎采用粒子针先行125I粒子植入,改变针道后再进行PVP;胸、腰椎则采用多支粒子针单、双侧穿刺于肿瘤后部植入125I粒子,再于椎体肿瘤的前、中部注入骨水泥完成PVP治疗,随访观察相关并发症及治疗效果。结果全部病例手术成功完成,植入粒子数目为4~30颗/节,骨水泥注入量为1~6 ml/节,20例(86.9%)术后患者疼痛缓解,5处(5/28,17.8%)发生骨水泥渗漏,1例神经孔渗漏引起神经根性疼痛,经治疗后好转。全组病例未发生脊髓损伤及放射性脊髓炎等严重并发症。结论 CT引导下PVP联合125I粒子植入治疗累及椎管的椎体转移瘤,能有效缓解患者的疼痛,控制肿瘤进展,骨水泥渗漏发生率低,临床应用安全。

^(125)I粒子植入联合动脉灌注化疗治疗不可切除性肺癌

目的探讨CT引导下125I粒子植入联合动脉灌注化疗治疗不可切除肺癌的价值。方法30例不可切除性肺癌患者随机分为两组。A组14例,125I粒子植入术前或后1周内行动脉灌注化疗;B组16例,单纯125I粒子植入治疗。两组患者125I粒子植入2个月后行胸部CT检查,按RECIST标准判定疗效并进行生存分析。结果30例患者全部按计划完成治疗。A组植入粒子552枚,9例行了2次动脉灌注化疗;B组共植入125I粒子603枚。CT复查显示:A组完全缓解(CR)0例,部分缓解(PR)10例,稳定(SD)4例,进展(PD)0例,治疗有效率为71.4%;B组完全缓解(CR)0例,部分缓解(PR)10例,稳定(SD)5例,进展(PD)1例,治疗有效率为62.5%。两组治疗有效率差异无统计学意义(P>0.05)。1年生存率分别为78.6%和62.5%,生存期差异有统计学意义(P<0.05)。结论125I粒子植入联合动脉灌注化疗是治疗不可切除性肺癌的一种有效方法,可显著延长患者的生存期。