超声引导下微波消融一线治疗原发性肝癌:临床疗效以及预后影响因素

目的评估超声引导下微波消融一线治疗原发性肝癌的临床疗效以及预后影响因素。方法 2010年6月到2014年11月,201例首次诊断为原发性肝癌的患者在本中心接受超声引导下微波消融治疗,随访时间4~53个月。使用单因素(Kaplan-Meier模型)以及多因素(Cox回归)分析对患者肿瘤复发以及生存的预后因素进行评估。结果肿瘤初次完全消融率为96%,部分患者接受了2次消融,总计完全消融率为99%。微波消融治疗后并发症发生率为5.6%(12/201)。患者术后平均无瘤生存时间为18个月、肝功能Child B级、肿瘤多发、肿瘤直径5 cm、AFP20μg/L是影响患者术后无瘤生存时间的独立危险因素。患者平均总生存时间为38个月,与之相关的独立危险因素为肝炎病史、肿瘤多发以及肿瘤直径5 cm。结论超声引导下微波消融一线治疗原发性肝癌是安全和有效的,肿瘤直径、数量以及患者肝功能状况是影响患者预后的主要因素。     

Technical and safety performance of CT-guided percutaneous microwave ablation for lung tumors: an ablate and resect study

BackgroundPercutaneous image-guided thermal ablation has an increasing role in the treatment of primary and metastatic lung tumors. Achieving acceptable clinical outcomes requires better tools for pre-procedure prediction of ablation zone size and shape.MethodsThis was a prospective, non-randomized, single-arm, multicenter study conducted by Medtronic (ClinicalTrials.gov ID: {"type":"clinical-trial","attrs":{"text":"NCT02323854","term_id":"NCT02323854"}}NCT02323854). Subjects scheduled for resection of metastatic or primary lung nodules underwent preoperative percutaneous microwave ablation. Ablation zones as measured via CT imaging following ablation immediately and before resection surgically versus predicted ablation zones as prescribed by the investigational system software were compared. This CT scan occurred after the ablation was finished but the antenna still in position. Time (minutes) from antenna placement to removal was 23.7±13.1 (n=14); median: 21.0 (range, 6.0 to 48.0). The definition of the secondary endpoint of complete ablation was 100% non-viable tumor cells based on nicotinamide adenine dinucleotide hydrogen (NADH) staining. Safety endpoints were type, incidence, and severity of adverse events.ResultsFifteen patients (mean age 58.9 years; 67% male; 33% female) were enrolled in the study, 33.3% (5/15) with previous thoracic surgery, 73% (11/15) with metastasis, and 27% (4/15) with primary lung tumors. All underwent percutaneous microwave ablation followed by surgical resection the same day. Complete ablation was detected in 54.4% (6/11), incomplete ablation in 36.4% (4/11), and delayed necrosis in 9.1% (1/11). There were no device-related adverse events. Ablation zone volume was overestimated in all patients.ConclusionsHistological complete ablation was observed in 55% of subjects. CT scanning less than an hour after ablation and tissue shrinkage may account for the smaller zone of ablation observed compared to predicted by the investigational system software.     

Reconstruction of the abdominal wall by using a combination of the human acellular dermal matrix implant and an interpositional omentum flap after extensive tumor resection in patients with abdominal wall neoplasm： A preliminary result

AIM： To present our trial using a combination of the human acellular dermal matrix （HADM） implant and an interpositional omentum flap to repair giant abdominal wall defects after extensive tumor resection.
METHODS： Between February and October of 2007, three patients with giant defects of the abdominal wall after extensive tumor resection underwent reconstruction with a combination of HADN and omentum flap. Postoperative morbidities and signs of herniation were monitored.
RESULTS： The abdominal wall reconstruction was successful in these three patients, there was no severe morbidity and no signs of herniation in the follow-up period.
CONCLUSION： The combination of HADM and omentum flap offers a new, safe and effective alternative to traditional forms in the repair of giant abdominal wall defects. Further analysis of the long-term outcome and more cases are needed to assess the reliability of this technique.     

超声引导下经皮微波消融治疗肝尾状叶原发性大肝癌(附13例报道)

目的评估微波消融治疗肝尾状叶大肿瘤的安全性、有效性。方法总结2011年12月至2018年9月上海市仁济医院13例尾状叶原发性大肝癌患者微波消融治疗的临床资料,探讨微波消融治疗尾状叶大肝癌的完全消融率、并发症以及患者预后情况。结果13例患者均成功消融。初次完全消融率10例,总消融12例;1、2,3年总体生存分别为11例、10例和6例;2例发生消融相关性梗阻性黄疸,经治疗后恢复正常,未见相关手术死亡。结论对于高危部位的尾状叶肝脏大肿瘤,微波消融治疗安全、有效、可行,可作为不可切除患者有潜力的候选或替代。     

International multicentre prospective study on microwave ablation of liver tumours: preliminary results

BackgroundMicrowave ablation (MWA) is increasingly utilized in the treatment of hepatic tumours. Promising single-centre reports have demonstrated its safety and efficacy, but this modality has not been studied in a prospective, multicentre study.MethodsEighteen international centres recorded operative and perioperative data for patients undergoing MWA for tumours of any origin in a voluntary Internet-based database. All patients underwent operative MWA using a 2.45-GHz generator with a 5-mm antenna.ResultsOf the 140 patients, 114 (81.4%) were treated with MWA alone and 26 (18.6%) were treated with MWA combined with resection. Multiple tumours were treated with MWA in 40.0% of patients. A total of 299 tumours were treated in these 140 patients. The median size of ablated lesions was 2.5 cm (range: 0.5–9.5 cm). Tumours were treated with a median of one application (range: 1–6 applications) for a median of 4 min (range: 0.5–30.0 min). A power setting of 100 W was used in 78.9% of cases. Major morbidity was 8.3% and in-hospital mortality was 1.9%.ConclusionsThese multi-institution data demonstrate rapid ablation time and low morbidity and mortality rates in patients undergoing operative MWA with a high rate of multiple ablations and concomitant hepatic resection. Longterm follow-up will be required to determine the efficacy of MWA relative to other forms of ablative therapy.Multicentre experience showing that microwave ablation is associated with low risk of morbidity and mortality when used alone or in combination with liver resection for a variety of liver tumours     

Percutaneous microwave and radiofrequency ablation for hepatocellular carcinoma: a retrospective comparative study

Background Percutaneous microwave ablation and radiofrequency ablation are two commonly used modalities for the treatment of hepatocellular carcinoma; however, comparisons of them have not been documented adequately. Methods Of 102 patients with biopsy-proved hepatocellular carcinoma, 49 (98 nodules) were treated percutaneously with microwave ablation and 53 (72 nodules) with radiofrequency ablation. The local tumor control, complications related to treatment, and long-term results of the two modalities were compared retrospectively. Results The complete ablation rates were 94.9% (93/98) using microwave ablation vs 93.1% (67/72) using radiofrequency ablation (P = 0.75), and no significant differences were found either in the ablation of tumors of 3.0 cm or less (P = 1.00) or in those of more than 3.0 cm (P = 1.00) between the two modalities. The local recurrence rates were 11.8% (11/93) using microwave ablation vs 20.9% (14/67) using radiofrequency ablation (P = 0.12), and there were no significant differences between the two modalities either in tumors of 3.0 cm or less (P = 0.36) or in those of more than 3.0 cm (P = 0.82). The rates of major complications associated with microwave ablation and radiofrequency ablation were 8.2% (4/49) vs 5.7% (3/53; P = 0.71). The disease-free survival rates in the microwave ablation group were 45.9%, 26.9%, 26.9%, and 13.4% at 1, 2, 3, and 4 years, respectively, and those in the radiofrequency ablation group were 37.2%, 20.7%, and 15.5% at 1, 2 and 3 years, respectively (P = 0.53). The 1-, 2-, 3-, and 4-year cumulative survival rates for patients who underwent microwave ablation were 81.6%, 61.2%, 50.5%, and 36.8%, respectively, and for patients who underwent radiofrequency ablation the rates were 71.7%, 47.2%, 37.6%, and 24.2%, respectively (P = 0.12). Conclusions Percutaneous microwave ablation and radiofrequency ablation are both effective methods in treating hepatocellular carcinomas. The local tumor control, complications related to treatment, and long-term survivals were equivalent for the two modalities.     

Needle track seeding： a real hazard after percutaneous radiofrequency ablation for colorectal liver metastasis

Neoplastic needle track seeding following percutaneous radiofrequency ablation （RFA） of secondary liver tumors is exceedingly rare. Reports on cutaneous tumor seeding after percutaneous RFA for colorectal liver metastasis are even rarer in the literature. Here we report a case of a 46-year-old female who developed an ulcerating skin lesion along the needle track of a previous percutaneous RFA site around 6 mo after the procedure. The previous RFA was performed by the LeVeen~ needle for a secondary liver tumor from a primary rectal cancer. The diagnosis of secondary skin metastasis was confirmed by fine needle aspiration cytology. The lesion was successfully treated with wide local excision. We believe that tumor seeding ＂after percutaneous RFA in our patient was possibly related to its unfavorable subcapsular location and the use of an expansion-type needle. Hence, prophylactic ablation of the needle track should be performed whenever possible. Otherwise, alternative routes of tumor ablation such as laparoscopic or open RFA should be considered.     

A prospective trial of CT-guided percutaneous microwave ablation for lung tumors

BackgroundPercutaneous ablation is an alternative treatment for lung cancer in non-operable patients. This is a prospective clinical trial for percutaneous microwave ablation (pMWA) of biopsy-proven lung cancer to demonstrate safety and efficacy.MethodsA prospective trial from 6-1-2016 to 1-1-2019 enrolled patients with biopsy-proven primary or metastatic lung cancer <3 cm in size and 1 cm away from the pleura for pMWA with the Emprint Ablation System with Thermosphere Technology for Phase I analysis, (Clinicaltrials.gov; #NCT0267302). Patients were followed for 1 year with PET/CT and PET/MR to determine patterns of recurrence and efficacy of ablation.ResultsAfter 12 patients consented for biopsy, 6 patients underwent treatment of 7 lesions, 3/6 women, median age of 67 (IQR, 65–70) years, body mass index (BMI): 27.8 (IQR, 21.4–32.1) kg/m², lesion distance to pleura 24.4 (IQR, 13–38) mm, lesion size of 10.7 (IQR, 6–14) mm, and ablation duration time 5.9 (IQR, 3–10) minutes. pMWA were completed at 75 W. Twelve adverse events were reported (1 Grade 3, 3 Grade 2, and 8 Grade 1 events) with Grade 4 or 5 events. Mean % change after ablation in forced expiratory volume in one second (FEV1) was −2% and diffusion capacity for carbon monoxide (DLCO) was −1%. After 2–3 months, the lesions would decrease in size, rim thickness, fluorodeoxyglucose (FDG) activity, and T2 signal. FDG activity after 6 months was below blood pool in all cases. The ablation zones stabilized by 6–12 months. One patient expired during the study from pneumonia unrelated to ablation without local recurrence. Of the seven ablations during the 1 year follow-up, there was local tumor recurrence at 271 days following ablation at the apex of the ablation zone, subsequently successfully treated with percutaneous cryoablation (Cryo).ConclusionspMWA appears to be a safe and effective mechanism for treatment of primary and secondary tumors of the lung, with possible preservation of pulmonary function.     

超声引导微波消融治疗老年肝癌及并发症防范

目的总结超声引导经皮微波消融(PMWA)治疗老年肝癌的效果及并发症的防范措施。方法对207例65岁老年肝癌患者374个病灶按肿瘤大小和数量分为两组,肿瘤直径4 cm且少于3个病灶称为A组;肿瘤直径4 cm多于3个病灶或者单个病灶6 cm称为B组,两组均进行超声引导PMWA治疗,术后观察疗效和并发症,以超声造影或增强核磁检查病灶无强化为完全消融,治疗后定期随访6~60个月,对有肿瘤进展或复发者行再次消融治疗。结果全组病例经皮微波消融术后1个月增强检查显示完全消融326个病灶,占87.2%(326/374),A、B两组的1、2、3、4、5年存活率为分别为:A组95.3%、84.6%、82.5%、79.2%、68.8%;B组62.5%、55.6%、31.2%、27.3%、0.0%,两组差异有统计学意义(P=0.021)。B组术后出现严重并发症4例,占1.07%(4/374),包括2例腹腔出血,2例肝脓肿。无胃肠及胆管损伤、胆瘘、针道种植。结论 PMWA是治疗老年肝癌的有效方法,肿瘤大小和个数、肝功能基础是影响术后生存期的重要因素,消融针型和功率及时间组合是防止胃肠、胆道、膈肌损伤的有效措施,术后全身支持、抗腹腔感染等综合治疗可减少致命并发症。     

超声引导下新型内冷微波天线消融治疗肝癌临床研究

目的比较新型内冷天线与非内冷天线微波消融治疗肝癌的临床效果。方法在超声引导下,应用新型内冷天线对43例肝细胞癌患者进行微波消融治疗,将术中与术后的并发症、1月后消融灶的残癌率、1年内消融灶的原位复发率及1年后肝内肝细胞癌总的复发率等指标与以往应用非内冷微波天线消融治疗的17例肝细胞癌患者的相应结果进行比较分析。结果与非内冷天线比较,新型内冷天线治疗患者疼痛发生率从90.9%下降到38.5%,无拔针困难和皮肤烫伤并发症,术后出血并发症也明显减少,两组比较,有显著统计学差异（P〈0.05）;影像学检查表明,新型内冷天线的微波消融灶较非内冷天线者球体性好,R值更接近1（P〈0.01）;新型内冷天线治疗后1月的残癌率（1.9%）及1年内消融部位的原位复发率（5.8%）显著较非内冷天线者（分别为13.6%和22.7%）减低（P〈0.05）,而两组术后一年期肝内肝细胞癌总的复发率无显著性差别（P〉0.05）。结论与非内冷天线治疗比,新型内冷天线能有效降低肝癌经皮微波消融治疗的术中、术后并发症和原位复发率,更适合肝癌的微波消融治疗。     

Practice guidelines for ultrasound-guided percutaneous microwave ablation for hepatic malignancy

Primary liver cancer and liver metastases are among the most frequent malignancies worldwide,with an increasing number of new cases and deaths every year.Traditional surgery is only suitable for a limited proportion of patients and imaging-guided percutaneous thermal ablation has achieved optimistic results for management of hepatic malignancy.This synopsis outlines the first clinical practice guidelines for ultrasoundguided percutaneous microwave ablation therapy for hepatic malignancy,which was created by a joint task force of the Society of Chinese Interventional Ultrasound.The guidelines aim at standardizing the microwave ablation procedure and therapeutic efficacy assessment,as well as proposing the criteria for the treatment candidates.     

经皮B超引导下微波消融术治疗肝脏巨大血管瘤的可行性、安全性及疗效分析

目的评估微波消融治疗肝脏巨大血管瘤(直径≥10 cm)的可行性、安全性和有效性。方法 2013年12月到2016年6月间,12例肝脏巨大血管瘤(≥10 cm)患者共13个肿瘤接受超声引导下经皮穿刺微波消融治疗。观察治疗相关并发症。所有患者均在术后1个月通过磁共振或增强计算机成像(CT)随访,评估消融治疗效果。结果 12例患者中男性4例,女性8例,平均年龄(41±10)岁。除1例同时存在2枚直径≥10 cm的肝血管瘤,其他患者均只有1枚直径≥10cm。肿瘤最大直径平均(11.7±1.6)cm。13枚巨大血管瘤初始共接受17次微波消融治疗(4例采取有计划2次消融),单枚血管瘤的消融平均时间(39.0±14.4)min。术后2例患者出现急性非少尿型肾功能不全,无腹腔内出血、肝功能衰竭等并发症发生。平均随访时间20.7个月,9例患者10个巨大血管瘤完全坏死,体积显著缩小,一次性完全消融10/13枚。1例术后残留者因生长速度较快,于术后第5个月实施二次微波消融,复查完全坏死,故总体完全消融11/13枚。另外2例因残留体积较小而定期复查,未予任何有创治疗。结论影像引导下微波消融肝脏巨大血管瘤安全、可行,且操作简单、快捷、恢复迅速、损伤轻微,无远期并发症,因而有潜力成为肝脏巨大血管瘤的一线治疗方式。     

原发性肝癌患者微波消融治疗后外周血T淋巴细胞亚群的变化

目的：观察原发性肝癌患者微波消融治疗前后外周血T淋巴细胞亚群的变化。方法152例原发性肝癌患者在微波消融治疗前1d、治疗后1 w和4 w,以流式细胞术检测患者外周血CD4＋和CD8＋淋巴细胞数量,采用全自动生化免疫分析仪检测甲胎蛋白水平。术后1 m进行肝脏CT增强扫描观察。结果在微波消融治疗后1 w和4 w,患者外周血CD4＋T淋巴细胞上升至（26.5±3.8）%和（32.3±5.1）%,CD4＋/CD8＋比值上升至（1.12±0.43）和（1.51±0.40）,而CD8＋T淋巴细胞下降至（47.2±7.7）%和（28.1±7.3）%,与治疗前1d时基线水平[CD4＋、CD8＋和CD4＋/CD8＋分别为（21.4±4.1）%、（58.6±7.8）%和（0.98±0.45）]比,变化有统计学意义（P均〈0.05）;甲胎蛋白水平由基线水平[（1109±727） ng/ml]下降,术后1w和4w分别为（890±681） ng/ml 和（215±18） ng/ml（P〈0.01）;微波消融后1m行增强CT检查,示病灶完全灭活率为97.4%（148/152）。结论微波消融治疗使原发性肝癌患者外周血T淋巴细胞亚群向CD4＋T淋巴细胞优势转变,可能对治疗效果的取得发挥了作用。     

How to perform posterior wall isolation in catheter ablation for atrial fibrillation

Catheter ablation has become standard of care in patients with symptomatic atrial fibrillation (AF). Although there have been significant advances in our understanding and technology, a substantial proportion of patients have ongoing AF requiring repeat procedures. Pulmonary vein isolation (PVI) is the cornerstone of AF ablation; however, it is less effective in patients with persistent as opposed to paroxysmal atrial fibrillation. Left atrial posterior wall isolation (PWI) is commonly performed as an adjunct to PVI in patients with persistent AF with nonrandomized studies showing improved outcomes. Anatomical considerations and detailed outline of the various approaches and techniques to performing PWI are detailed, and advantages and pitfalls to assist the clinical electrophysiologist successfully and safely complete PWI are described.     

Experimental study of destruction to porcine spleen in vivo by microwave ablation

AIM: To discuss the safety, feasibility and regularity of destruction to porcine spleen in vivo with congestion and tumescence by microwave ablation (MWA). METHODS: Ligation of the splenic vein was used to induce congestion and tumescence in vivo in five porcine spleens, and microwave ablation was performed 2-4 h later. A total of 56 ablation points were ablated and the ablation powers were 30-100 W. The ablation time (1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 min) was performed at a power of 60 W. After ablation, t...     

The safety and efficacy of endoscopic ultrasound-guided ablation therapy for solid pancreatic tumors: a systematic review

Abstract

Background and aims

Recently, endoscopic ultrasound (EUS)-guided ablation therapy, as a minimally invasive technique, has shown its potential to substitute surgery in treating solid pancreatic tumors, such as small potential malignant pancreatic tumors, small insulinomas and locally advanced pancreatic ductal adenocarcinoma (LAPDAC). Therefore, we conducted this systematic review to assess the safety and efficacy of EUS-guided ablation therapy for solid pancreatic tumors.     

肿瘤残余在肝癌微波消融治疗后出现的原因及防治

目的:探讨微波消融术后肿瘤残余的原因及防治措施.方法:回顾性总结了中国医科大学附属第四医院2004-10/2010-06 465例(796个肿瘤结节)肝癌患者行微波消融治疗的临床资料,分析了48例患者微波消融术后肿瘤残余的原因.结果:436例患者(754个肿瘤结节)获得有效复查资料,其中48例(48/436,11.01...     

Local ablation of pancreatic tumors: State of the art and future perspectives

BACKGROUNDCurrently, the technologies most commonly used to treat locally advanced pancreatic cancer are radiofrequency ablation (RFA), microwave ablation, and irreversible (IRE) or reversible electroporation combined with low doses of chemotherapeutic drugs.AIMTo report an overview and updates on ablative techniques in pancreatic cancer.METHODSSeveral electronic databases were searched. The search covered the years from January 2000 to January 2021. Moreover, the reference lists of the found papers were analysed for papers not indexed in the electronic databases. All titles and abstracts were analysed.RESULTSWe found 30 studies (14 studies for RFA, 3 for microwave therapy, 10 for IRE, and 3 for electrochemotherapy), comprising 1047 patients, which were analysed further. Two randomized trials were found for IRE. Percutaneous and laparotomy approaches were performed. In the assessed patients, the median maximal diameter of the lesions was in the range of 2.8 to 4.5 cm. All series included patients unfit for surgical treatment, but Martin et al assessed a subgroup of patients with borderline resectable tumours who underwent resection with margin attenuation with IRE. Most studies administered chemotherapy prior to ablative therapies. However, several studies suggest that the key determinant of improved survival is attributable to ablative treatment alone. Nevertheless, the authors suggested chemotherapy before local therapies for several reasons. This strategy may not only downstage a subgroup of patients to curative-intent surgery but also support to recognize patients with biologically unfavourable tumours who would likely not benefit from ablation treatments. Ablation therapies seem safe based on the 1047 patients assessed in this review. The mortality rate ranged from 1.8% to 2%. However, despite the low mortality, the reported rates of severe post procedural complications ranged from 0%-42%. Most reported complications have been self-limiting and manageable. Median overall survival varied between 6.0 and 33 mo. Regarding the technical success rate, assessed papers reported an estimated rate in the range of 85% to 100%. However, the authors reported early recurrence after treatment. A distinct consideration should be made on whether local treatments induce an immune response in the ablated area. Preclinical and clinical studies have shown that RFA is a promising mechanism for inducing antigen-presenting cell infiltration and enhancing the systemic antitumour T-cell immune response and tumour regression.CONCLUSIONIn the management of patients with pancreatic cancer, the possibility of a multimodal approach should be considered, and conceptually, the combination of RFA with immunotherapy represents a novel angle of attack against this tumour.     

Prognostic factors for survival after transarterial chemoembolization combined with microwave ablation for hepatocellular carcinoma

AIM: To analyze prognostic factors for survival after transarterial chemoembolization (TACE) combined with microwave ablation (MWA) for hepatocellular carcinoma (HCC).METHODS: Clinical data of 86 patients who underwent TACE combined with MWA between January 2006 and December 2013 were retrospectively analyzed in this study. Survival curves were detected using log-rank test. Univariate analysis was performed using log-rank test with respect to 13 prognostic factors affecting survival. All statistically significant prognostic factors identified by univariate analysis were entered into a Cox proportion hazards regression model to identify independent predictors of survival. P values were two-sided and P < 0.05 was considered statistically significant.RESULTS: Median follow-up time was 47.6 mo, and median survival time of enrolled patients was 21.5 mo. The 1-, 2-, 3- and 5-year overall survival rates were 72.1%, 44.1%, 31.4% and 13.9%, respectively. Tumor size(χ² = 14.999, P = 0.000), Barcelona Clinic Liver Cancer (BCLC) stage (χ² = 29.765, P = 0.000), Child-Pugh class (χ² = 51.820, P = 0.000), portal vein tumor thrombus (PVTT) (χ² = 43.086, P = 0.000), arterio-venous fistula (χ² = 29.791, P = 0.000), MWA therapy times (χ² = 12.920, P = 0.002), Eastern Cooperative Oncology Group (ECOG) score (χ² = 28.660, P = 0.000) and targeted drug usage (χ² = 10.901, P = 0.001) were found to be significantly associated with overall survival by univariate analysis. Multivariate analysis identified that tumor size (95%CI: 1.608-4.962, P = 0.000), BCLC stage (95%CI: 1.016-2.208, P = 0.020), PVTT (95%CI: 2.062-9.068, P = 0.000), MWA therapy times (95%CI: 0.402-0.745, P = 0.000), ECOG score (95%CI: 1.012-3.053, P = 0.045) and targeted drug usage (95%CI: 1.335-3.143, P = 0.001) were independent prognostic factors associated with overall survival.CONCLUSION: Superior performance status, MWA treatment and targeted drug were favorable factors, and large HCC, PVTT and advanced BCLC stage were risk factors for survival after TACE-MWA for HCC.     

Complications of high intensity focused ultrasound in patients with recurrent and metastatic abdominal tumors

AIM: To analyze the local and systemic complications of high intensity focused ultrasound (HIFU) for patients with recurrent and metastatic abdominal tumors.METHODS: From Aug 2001 to Aug 2004, 17 patients with recurrent and metastatic abdominal tumors were enrolled in this study. Real-time sonography was taken, and vital signs, liver and kidney function, skin burns, local reactions, and systemic effects were observed and recored before, during, and after HIFU. CT and MRI were also taken before and after HIFU.RESULTS: All 17 patients had skin burns and pain in the treatment region; the next common complication was neurapraxia of the stomach and intestines to variable degrees. The other local and systemic complications were relatively rare. Severe complications were present in two patients; one developed a superior mesenteric artery infarction resulting in necrosis of the entire small intestines, and the other one suffered from a perforation in terminal ileum due to HIFU treatment. CONCLUSION: Although HIFU is a one of noninvasive treatments for the recurrent and metastatic abdominal tumors, there are still some common and severe complications which need serious consideration.