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.

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.

Radioactive 125I seed implantation for pancreatic cancer with unexpected liver metastasis:A preliminary experience with 26 patients

BACKGROUND Preoperative diagnosis rate of pancreatic cancer has increased year by year.The prognosis of pancreatic cancer patients with unexpected liver metastasis found by intraoperative exploration is very poor,and there is no effective and unified treatment strategy.AIM To evaluate the therapeutic effect of radioactive 125I seed implantation for pancreatic cancer patients with unexpected liver metastasis.METHODS The demographics and perioperative outcomes of patients who underwent 125I seed implantation to treat pancreatic cancer with unexpected liver metastasis between January 1,2017 and June 1,2019 were retrospectively analyzed.During the operation,125I seeds were implanted into the pancreatic tumor under the guidance of intraoperative ultrasound,with a spacing of 1.5 cm and a row spacing of 1.5 cm.For patients with obstructive jaundice and digestive tract obstruction,choledochojejunostomy and gastroenterostomy were performed simultaneously.After operation,the patients were divided into a non-chemotherapy group and a chemotherapy group that received gemcitabine combined with albumin-bound paclitaxel treatment.RESULTS Preoperative imaging evaluation of all patients in this study showed that the tumor was resectable without liver metastasis.There were 26 patients in this study,including 18 males and 8 females,aged 60.5±9.7 years.The most common tumor site was the pancreatic head(17,65.4%),followed by the pancreatic neck and body(6,23.2%)and pancreatic tail(3,11.4%).Fourteen patients(53.8%)underwent palliative surgery and postoperative pain relief occurred in 22 patients(84.6%).The estimated blood loss in operation was 148.3±282.1 mL and one patient received blood transfusion.The postoperative hospital stay was 7.6±2.8 d.One patient had biliary fistula,one had pancreatic fistula,and all recovered after conservative treatment.After operation,7 patients received chemotherapy and 19 did not.The 1-year survival rate was significantly higher in patients who received chemotherapy than in those who did not(68.6%vs 15.8%,P=0.012).The mean overall survival of patients in the chemotherapy group and non-chemotherapy group was 16.3 mo and 10 mo,respectively(χ2=7.083,P=0.008).CONCLUSION Radioactive 125I seed implantation combined with postoperative chemotherapy can prolong the survival time and relieve pain of pancreatic cancer patients with unexpected liver metastasis.

To explore the curative effect of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳprimary hepatocellular carcinoma

Objectives: To explore the clinical efficacy and survival of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳ primary hepatocellular carcinoma.Methods: A retrospective study of 62 patients with primary hepatocellular carcinoma in our hospital from January2017 to December 2018 [60 males, 2 females, age(52.76 ± 10.82) years old], All patients were implanted with Iodine-125 radioactive seeds under CT guidance, followed up regularly after operation to observe the clinical efficacy, including comparison of changes in cancer size before and after treatment, tumor marker AFP, and improvement in complications such as abdominal pain and ascites. Follow-up 3–36 months to assess patient survival.Results: Among the 62 patients, 3 months after Iodine-125 radioactive seed implantation, 5 cases(8.1%) had complete remission of cancer, 33 cases(53.2%) had partial remission, 12 cases(19.4%) had stable lesions, and 12 cases(19.4%) had disease progression. The effective rate was 61.3%. The tumor volume(31.44 ± 14.51 cm3) was significantly smaller than before(50.96 ± 30.13 cm3)(t=5.303, p < 0.05). The tumor marker AFP(69.28 ±50.99) ug/L of 3 months after implantation was significantly lower than that before treatment(90.63 ± 68.58)ug/L(t=3.702, P < 0.05). The average survival time of Iodine-125 seed implantation for stageⅣhepatocellular carcinoma is 11.47 ± 0.85 months, and the median survival time is 9 months. The survival time of the group with better pathological differentiation(grade Ⅰ+ⅡⅠ) was significantly better than that of the group with poor differentiation(grade Ⅲ+Ⅳ)(x2=6.869 p < 0.05). Among the 38 patients with different degrees of abdominal pain,22 patients improved better than before;15 of 28 patients with different degrees of ascites were better than before. All patients had no serious complications related to treatment.Conclusions: Iodine-125 radioactive seed implantation therapy can safely and effectively treat hepatocellular carcinoma, and relieve the clinical symptoms of abdominal pain and ascites.

Significance of 125I radioactive seed implantation on growth differentiation factor and programmed death receptor-1 during treatment of oral cancer

BACKGROUND Oral cancer(OC)is the most common malignant tumor in the oral cavity,and is mainly seen in middle-aged and elderly men.At present,OC is mainly treated clinically by surgery or combined with radiotherapy and chemotherapy;but recently,more and more studies have shown that the stress trauma caused by surgery and the side effects of radiotherapy and chemotherapy seriously affect the prognosis of patients.AIM To determine the significance of 125I radioactive seed implantation on growth differentiation factor 11(GDF11)and programmed death receptor-1(PD-1)during treatment of OC.METHODS A total of 184 OC patients admitted to The Second Affiliated Hospital of Jiamusi University from May 2015 to May 2017 were selected as the research subjects for prospective analysis.Of these patients,89 who received 125I radioactive seed implantation therapy were regarded as the research group(RG)and 95 patients who received surgical treatment were regarded as the control group(CG).The clinical efficacy,incidence of adverse reactions and changes in GDF11 and PD-1 before treatment(T0),2 wk after treatment(T1),4 wk after treatment(T2)and 6 wk after treatment(T3)were compared between the two groups.RESULTS The efficacy and recurrence rate in the RG were better than those in the CG(P<0.05),while the incidence of adverse reactions and survival rate were not different.There was no difference in GDF11 and PD-1 between the two groups at T0 and T1,but these factors were lower in the RG than in the CG at T2 and T3(P<0.05).Using receiver operating characteristic(ROC)curve analysis,GDF11 and PD-1 had good predictive value for efficacy and recurrence(P<0.001).CONCLUSION 125I radioactive seed implantation has clinical efficacy and can reduce the recurrence rate in patients with OC.This therapy has marked potential in clinical application.The detection of GDF11 and PD-1 in patients during treatment showed good predictive value for treatment efficacy and recurrence in OC patients,and may be potential targets for future OC treatment.

Intraoperative permanent implantation of radioactive I-125 seed for local advanced non small lung cancer

Objective： To study the clinical efficacy and methods of permanent implantation of radioactive I-125 seed in surgery for local advanced non small lung cancer （LANSCLC）. Methods： From Apr. 2004 to Apr. 2006, the I-125 seeds were implanted into 30 patients with LANSCLC in surgery. The numbers of seeds were 10-40. The chemotherapy was performed in 10 to 14 days after operation. Results： There was no operative death, and the distribution of seeds and complications were reviewed by CT and X-ray after treatment. The distribution of seeds was satisfactory in all patients. The complete response rate （CR） was 56.6% and the part response （PR） was 26.6%. The overall response rate was 83.3% after 4-24 months of surgery. There was no one occurred radiation pneumonia. Prospective efficacy await further follow-up. Conclusion： Permanent implantation of 1-125 seed in surgery for LANSCLC, is a safe and effective method with mild complications.

Re-canalized stenostic rabbit nasolacrimal duct by the ^(125)I radioactive probing:Affecting Bcl-2 and Bax protein expression

To evaluate the ^(125)I radioactive probing re-canalizing stenostic nasolacrimal duct,the nasolacrimal duct stenosis models in epithelium and connective tissues are experimentally structured by inbred white rabbits(New Zealand),including the nasolacrimal duct stenosis,the mechanical probing with outer layer of thermoplastic tube,and the ^(125)I radioactive probing with the ^(125)I seeds sealing into the thermoplastic tube.After re-canalized for four weeks, tissue specimens from bilateral nasolacrimal ducts are obtained,and the Bcl-2 and Bax protein expression levels are evaluated by immunohistochemical staining analysis.Comparing with the blank control,the expression levels of the Bcl-2 and Bax in the nasolacrimal duct stenosis and the mechanical probing are significantly up-/down-regulated(p<0.05),but in the ^(125)I radioactive probing are down-/up-regulated(p<0.05) and can be used to re-canalize the stenostic lacrimal passage.The results show that the ^(125)I radioactive probing is a therapeutical mechanism for radioactive probing strategy for treating nasolacrimal duct stenosis to induce cell apoptosis.

Biological effects of low-dose-rate irradiation of pancreatic carcinoma cells in vitro using ^(125)I seeds

AIM:To determine the mechanism of the radiationinduced biological effects of 125I seeds on pancreatic carcinoma cells in vitro.METHODS:SW1990 and PANC-1 pancreatic cancer cell lines were cultured in DMEM in a suitable environment.Gray’s model of iodine-125(125I)seed irradiation was used.In vitro,exponential phase SW1990,and PANC-1cells were exposed to 0,2,4,6,and 8 Gy using 125I radioactive seeds,with an initial dose rate of 12.13c Gy/h.A clonogenic survival experiment was performed to observe the ability of the cells to maintain their clonogenic capacity and to form colonies.Cell-cycle and apoptosis analyses were conducted to detect the apoptosis percentage in the SW1990 and PANC-1 cells.DNA synthesis was measured via a tritiated thymidine(3H-Td R)incorporation experiment.After continuous low-dose-rate irradiation with 125I radioactive seeds,the survival fractions at 2 Gy(SF2),percentage apoptosis,and cell cycle phases of the SW1990 and PANC-1 pancreatic cancer cell lines were calculated and compared.RESULTS:The survival fractions of the PANC-1 andSW1990 cells irradiated with 125I seeds decreased exponentially as the dose increased.No significant difference in SF2 was observed between SW1990 and PANC-1 cells(0.766±0.063 vs 0.729±0.045,P<0.05).The 125I seeds induced a higher percentage of apoptosis than that observed in the control in both the SW1990and PANC-1 cells.The rate of apoptosis increased with increasing radiation dosage.The percentage of apoptosis was slightly higher in the SW1990 cells than in the PANC-1 cells.Dose-dependent G2/M cellcycle arrest was observed after 125I seed irradiation,with a peak value at 6 Gy.As the dose increased,the percentage of G2/M cell cycle arrest increased in both cell lines,whereas the rate of DNA incorporation decreased.In the 3H-Td R incorporation experiment,the dosimetry results of both the SW1990 and PANC-1cells decreased as the radiation dose increased,with a minimum at 6 Gy.There were no significant differences in the dosimetry results of the two cell lines when they were exposed to the same dose of radiation.CONCLUSION:The pancreatic cancer cell-killing effects induced by 125I radioactive seeds mainly occurred via apoptosis and G2/M cell cycle arrest.

CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的价值

目的探讨计算机断层扫描(CT)引导下放射性^(125)I粒子植入联合肝动脉化疗栓塞(TACE)+射频消融治疗肝包膜下小肝癌的价值。方法选取2020年1月-2022年2月收治的80例肝包膜下小肝癌患者,随机分为观察组和对照组各40例,对照组采用TACE+射频消融术治疗,观察组在对照组的基础上采用CT引导下^(125)I粒子植入治疗,比较两组客观缓解率(ORR)、肝功能[谷丙转氨酶(ALT)、天冬氨酸转氨酶(AST)和总胆红素(TBil)]、血清肿瘤标志物[甲胎蛋白(APF)、癌胚抗原(CEA)]、不良反应以及无进展生存率。结果观察组ORR高于对照组(85.00%vs 62.50%,χ^(2)=5.230,P<0.05);两组ALT、AST、TBil水平比较,差异无统计学意义(P>0.05);治疗后,观察组APF、CEA水平低于对照组(t=7.616;t=8.938,P<0.05);两组不良反应水平比较,差异无统计学意义(P>0.05);观察组1年无进展生存率为80.00%,高于对照组的50.00%(Log Rankχ^(2)=7.487,P<0.05)。结论CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的疗效显著,可有效降低血清肿瘤标志物水平,提高无进展生存率,且安全性较好。

A pilot study on combination of cryosurgery and ^(125)iodine seed implantation for treatment of locally advanced pancreatic cancer

AIM: To study the therapeutic value of combination o cryosurgery and 125iodine seed implantation for locally advanced pancreatic cancer. METHODS: Forty-nine patients with locally advanced pancreatic cancer (males 36, females 13), with a median age of 59 years, were enrolled in the study. Twelve patients had liver metastases. In all cases the tumors were considered unresectable after a comprehensive evaluation. Patients were treated with cryosurgery, which was performed intraoperatively or percutaneously unde guidance of ultrasound and/or computed tomography (CT), and 125iodine seed implantation, which was performed during cryosurgery or post-cryosurgery under guidance of ultrasound and/or CT. A few patients received regional celiac artery chemotherapy. RESULTS: Thirteen patients received intraoperative cryosurgery and 36 received percutaneous cryosurgery Some patients underwent repeat cryosurgery. 125Iodine seed implantation was performed during freezing procedure in 35 patients and 3-9 d after cryosurgery in 14 cases. Twenty patients, 10 of whom had hepaticmetastases received regional chemotherapy. At 3 mo after therapy, CT was repeated to estimate tumor response to therapy. Most patients showed varying degrees of tumor necrosis. Complete response (CR) of tumor was seen in 20.4% patients, partial response (PR), in 38.8%, stable disease (SD), in 30.6%, and progressive disease (PD), in 10.2%. Adverse effects associated with cryosurgery included upper abdomen pain and increased serum amylase. Acute pancreatitis was seen in 6 patients one of whom developed severe pancreatitis. All adverse effects were controlled by medical management with no poor outcome. There was no therapy-related mortality. During a median follow-up of 18 mo (range of 5-40), the median survival was 16.2 mo, with 26 patients (53.1%) surviving for 12 mo or more. Overall, the 6-, 12-, 24- and 36-mo survival rates were 94.9%, 63.1%, 22.8% and 9.5%, respectively. Eight patients had survival of 24 mo or more. The patient with the longest survival (40 mo) is still living without evidence of tumor recurrence. CONCLUSION: Cryosurgery, which is far less invasive than conventional pancreatic resection, and is associated with a low rate of adverse effects, should be the treatment of choice for patients with locally advanced pancreatic cancer. 125Iodine seed implantation can destroy the residual surviving cancer cells after cryosurgery. Hence, a combination of both modalities has a complementary effect.

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放射性粒子植入联合局部3D-CRT治疗老年晚期非小细胞肺癌的临床效果与安全性

目的:探讨^(125)I放射性粒子植入联合局部三维适形放疗(3D-CRT)治疗老年晚期非小细胞肺癌(NSCLC)的临床效果与安全性。方法:选择2021年6月—2022年3月于邹平市人民医院肿瘤综合治疗中心首次就诊、经病理学确诊的52例老年晚期NSCLC患者作为研究对象,按照随机数表法将患者分为试验组和对照组,各26例。对照组采用3D-CRT治疗,试验组肺外周病灶在CT引导下行^(125)I放射性粒子植入,肺门及受累淋巴结区行3D-CRT治疗,比较两组近期疗效、不良反应发生情况。结果:试验组客观缓解率、疾病控制率分别为80.77%、88.46%,高于对照组的46.15%、57.69%,差异有统计学意义(P<0.05);试验组Ⅰ级、Ⅱ级放射性肺炎发生率低于对照组,差异有统计学意义(P<0.05);但两组Ⅰ级、Ⅱ级放射性食管炎、骨髓抑制、胃肠道反应发生率比较,差异无统计学意义(P>0.05)。结论:^(125)I放射性粒子植入联合局部3D-CRT治疗老年晚期NSCLC患者近期疗效显著,不良反应发生率低。

超声引导下放射性^(125)I粒子植入治疗转移性腹膜后去分化脂肪肉瘤1例

去分化脂肪肉瘤(DDLPS)是一种罕见的脂肪肉瘤亚型,预后不良。本病例报告描述了1例65岁中国女性的肝脏及腹膜后DDLPS,临床表现为无痛性腹部肿物。进行计算机断层扫描和超声检查发现瘤体较大且出现部分脏器转移,遂行腹膜后巨大肿瘤切除术及肝部分切除术。术后肿瘤免疫组织化学表现为S-100(+),SOX10(-),Desmin(+)。患者愈合良好,为控制转移病灶,术后三个月行超声引导下右侧腹膜后(肝肾间隙)肿瘤放射性^(125)I粒子植入治疗。通过粒子放射治疗,达到稳定病情的治疗目标。本病例报告对该患者的治疗及病例资料进行分析,从DDLPS的临床诊断、治疗和病理特点等方面对文献进行综述,以期提高诊疗水平。

腹部晚期肿瘤术中植入^(125)I粒子近期观察(附11例报道)

目的 :探讨12 5I放射性粒子术中植入 ,治疗腹部晚期肿瘤的意义。方法 :回顾性分析 2 0 0 1年 8月～ 11月术中植入12 5I粒子的晚期腹部恶性肿瘤患者 11例。结果 :全部患者共植入12 5I粒子 94粒 ,术后 1周复查外周血象及临床观察无毒副反应出现 ,3例顽固性疼痛患者症状得到明显改善。结论 :有针对性地选择腹部晚期肿瘤患者 ,在开腹探查术中即时在肿瘤区植入12 5I放射性粒子 ,其近期止疼效果满意 ,且安全可靠。

支气管动脉灌注联合^(125)I粒子植入治疗中晚期肺癌的临床研究

目的:探讨支气管动脉灌注联合125I放射性粒子植入治疗中晚期肺部恶性肿瘤的临床疗效。方法:对102例中晚期肺癌患者分为两组,A组57例支气管动脉灌注联合125I放射性粒子植入治疗;B组45例支气管动脉灌注治疗,术后4周开始行CT随访,根据实体瘤疗效评价标准(RECIST)及患者生存时间评价两组的疗效。结果:术后12个月两组有效率(CR+PR)分别为83.3%、46.7%;A、B两组有显著性差异(P<0.05);术后6个月、12个月和24个月生存率A组为91.2%,82.5%,63.2%,明显高于B组的60%,33.3%,6.7%(P<0.05)。结论:支气管动脉灌注联合125I放射性粒子植入治疗中晚期肺癌是一种疗效显著、微创、安全的方法,是现阶段治疗中晚期肺癌的新选择。

超声引导下^(125)I放射性粒子植入治疗体表恶性肿瘤的研究

目的探讨超声引导下125I放射性粒子植入治疗体表恶性肿瘤的方法及疗效。方法术前根据肿瘤大小、粒子剂量、放射有效范围等,利用放射性粒子治疗计划系统计算出粒子分布及最佳数量,术中在超声引导下经皮穿刺将粒子按计划植入预定部位,术后超声检查粒子植入部位及有无漏植。结果腹股沟淋巴瘤4例,腮腺恶性肿瘤9例及甲状腺恶性肿瘤6例患者放射性粒子均成功植入预定部位,19例患者均未出现任何严重的并发症,生存质量明显提高。结论超声引导下125I放射性粒子植入治疗体表恶性肿瘤方法安全、疗效可靠。

多靶动脉减量灌注化疗联合^(125)I放射性粒子植入治疗ⅢB期非小细胞肺癌的临床意义

目的比较研究^(125)I放射性粒子植入联合多靶动脉减量灌注化疗治疗ⅢB期非小细胞肺癌(NSCLC)与联合静脉化疗临床疗效的差异。方法选取在2013年7月至2018年12月接受局部^(125)I放射性植入治疗联合化疗的ⅢB期NSCLC患者作为研究对象,收集患者各项临床特征资料,包括性别、年龄、体力状况、吸烟指数、病理类型、化疗方式、肿瘤体积(gross tumor volume,GTV)和100%靶区所受剂量(D100)等,接受动脉灌注化疗的患者为MAC组,接受静脉化疗的患者为SVC组。随访并行短期疗效评价和记录生存时间。结果57例SVC组CR、PR、SD和PR患者分别为1.8%(1/57)、47.4%(27/57)、45.6%(26/57)和5.3%(3/57),OR为49.1%;19例MAC组患者CR、PR、SD和PR分别为15.8%(3/19)、52.6%(10/19)、21.1%(4/19)和10.5%(2/19),OR为68.4%;两组差异有统计学意义(χ^(2)=8.192,P=0.042)。SVC组患者1、2和3年生存率分别为73.7%、26.3%和8.8%,mOS为16.3个月;MAC组患者1、2和3年生存率为84.2%、42.1%和15.8%,mOS为20.0个月;两组差异有统计学意义(χ^(2)=3.916,P=0.048)。亚组分析显示单一支气管动脉供血的患者mOS为25.0个月,多靶动脉供血患者mOS为16.8个月,两组患者OS差异明显(χ^(2)=3.944,P=0.047)。应用Cox模型单因素分析显示:GTV(HR=3.090,95%CI:1.057-8.884,P=0.036)、D100(HR=4.463,95%CI:1.261-15.798,P=0.020)、供血动脉(HR=5.885,95%CI:1.877-18.449,P=0.002)与OS显著相关,多因素分析显示:多靶动脉供血是影响OS的独立危险因素(HR=4.776,95%CI:1.265-18.039,P=0.021)。结论^(125)I放射性粒子植入治疗联合多靶动脉减量灌注化疗治疗ⅢB期NSCLC在局部病灶控制、延长生存时间方面优于联合静脉化疗,可作为治疗手段之一进行临床推广。

放射性^(125)Ⅰ粒子近距离照射家兔面神经的组织病理学及超微结构观察

目的:探讨放射性^(125)Ⅰ粒子近距离照射对家兔面神经影响的组织病理学及超微结构变化。方法:分别将1颗放射性^(125)Ⅰ粒子或粒子空壳植入新西兰大耳白兔右侧面神经旁(n=12),另取12只家兔作为正常对照。植入后7、14、30、60 d时取相应面神经行HE、AgNO3染色及丽春红G-亮绿SF双重染色,并制作透射电镜标本。结果:空壳粒子组面神经组织病理学结构与正常面神经结构相似;粒子组髓鞘及轴索出现不同程度的损害和修复性变化。结论:放射性^(125)Ⅰ粒子近距离照射可引起面神经损伤性以及修复性变化。