Objective To describe the transvenous catheterization technique for the treatment of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including its indications, complications and efficacy.Methods Eight patie...Objective To describe the transvenous catheterization technique for the treatment of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including its indications, complications and efficacy.Methods Eight patients with symptomatic CSdAVFs were treated by endovascular embolization with platinum coils, via the inferior petrosal sinus (IPS) in 6 patients, and via the Sylvian vein after surgical exposure in other 2 patients.Results Complete angiographic resolution of the fistula was obtained in six patients immediately after the procedures, and a complete resolution of symptoms and signs was achieved in all patients. The residual fistulas in two patients disappeared completely in the follow-up angiography.Conclusion Transvenous embolization is a useful and safe approach in the management of CSdAVFs.展开更多
BACKGROUND Gastrointestinal bleeding(GIB)is a severe and potentially life-threatening condition,especially in cases of delayed treatment.Computed tomography angiography(CTA)plays a pivotal role in the early identifica...BACKGROUND Gastrointestinal bleeding(GIB)is a severe and potentially life-threatening condition,especially in cases of delayed treatment.Computed tomography angiography(CTA)plays a pivotal role in the early identification of upper and lower GIB and in the prompt treatment of the haemorrhage.AIM To determine whether a volumetric estimation of the extravasated contrast at CTA in GIB may be a predictor of subsequent positive angiographic findings.METHODS In this retrospective single-centre study,35 patients(22 men;median age 69 years;range 16-92 years)admitted to our institution for active GIB detected at CTA and further submitted to catheter angiography between January 2018 and February 2022 were enrolled.Twenty-three(65.7%)patients underwent endoscopy before CTA.Bleeding volumetry was evaluated in both arterial and venous phases via a semi-automated dedicated software.Bleeding rate was obtained from volume change between the two phases and standardised for unit time.Patients were divided into two groups,according to the angiographic signs and their concordance with CTA.RESULTS Upper bleeding accounted for 42.9%and lower GIB for 57.1%.Mean haemoglobin value at the admission was 7.7 g/dL.A concordance between positive CTA and direct angiographic bleeding signs was found in 19(54.3%)cases.Despite no significant differences in terms of bleeding volume in the arterial phase(0.55 mL vs 0.33 mL,P=0.35),a statistically significant volume increase in the venous phase was identified in the group of patients with positive angiography(2.06 mL vs 0.9 mL,P=0.02).In the latter patient group,a significant increase in bleeding rate was also detected(2.18 mL/min vs 0.19 mL/min,P=0.02).CONCLUSION In GIB of any origin,extravasated contrast volumetric analysis at CTA could be a predictor of positive angiography and may help in avoiding further unnecessary procedures.展开更多
We present a 69-year-old woman with a duodenal obstruction after successful selective transcatheter arterial embolization (TAE) for a duodenal diverticular hemorrhage. Two weeks after TAE, the patient showed abrupt sy...We present a 69-year-old woman with a duodenal obstruction after successful selective transcatheter arterial embolization (TAE) for a duodenal diverticular hemorrhage. Two weeks after TAE, the patient showed abrupt symptoms of duodenal obstruction. Resolving hematomas after successful selective transcatheter arterial embolization should be thoroughly observed because they might result in duodenal fibrotic encasement featuring inflammatory duodenal wall thickening, duodenal deformity, dysmotility, and fi nally obstruction.展开更多
Objective:To explore the value of angiographic diagnosis and interventional therapy of the coronary artery fine branch fistula.Methods:All of the 18 patients with coronary artery fine branch fistula underwent selectiv...Objective:To explore the value of angiographic diagnosis and interventional therapy of the coronary artery fine branch fistula.Methods:All of the 18 patients with coronary artery fine branch fistula underwent selective coronary arteriography,7 underwent interventional therapy, while 8 underwent prosthesis for coronary artery fistula (CAF) under extracorpored circulation. Results:Among 18 cases of coronary artery fine branch fistula, 7 happened in right coronary artery (38.9%), 11 in left coronary artery (61.1%). Among the 11 cases in left coronary artery,5 happened in descending anterior branch, 5 occurred in left circumflex branch, 1 arised from both left anterior branch and left circumflex branch. Among the 18 cases, there are 10 cases of coronary-to-pulmonary artery fistula (55.6%), 5 cases of fistula draining into right atrium (27.8%), 2 cases of fistula draining into left atrium (11.1%) and 1 draining into right ventricle (5.6%). Interventional treatment was successful in 7 patients. During the 12 months’ follow-up, there was no cardiovascular events. Conclusion:Selective coronary angiography is the first choice for diagnosing the coronary artery fine branch fistula. In respect of therapy, besides of surgical treatment, intervention is still a rather good measure presently.展开更多
AIM: Clinical application and potential complication of percutaneous transsplenic varices embolization (PTSVE) of esophageal or gastrio-fundal varices in patients with hepatocellular carcinoma (HCC) complicated with p...AIM: Clinical application and potential complication of percutaneous transsplenic varices embolization (PTSVE) of esophageal or gastrio-fundal varices in patients with hepatocellular carcinoma (HCC) complicated with portal vein cancerous thrombosis (PVCT).METHODS: 18 patients with HCC complicated with PVCT and esophageal or gastrio-fundal varices who underwent PTSVE were collected. The rate of success, complication, mortality of the procedure and postoperative complication were recorded and analyzed.RESULTS: PTSVE were successfully performed in 16 of 18cases, and the rate of success was 89%. After therapy erythrocyte counts decreased in all of the natunts. 5 of patients needed blood transfusion, 2 patients requiredsurgical intervention because of and 11 patients with ascites were alleviated by diuresis. Among these 18patients, the procedure-related mortality was 11% (2/18),one died of acute hepatic failure on the forth day after procedure, another died of acute renal failure on the fifth day. The patients were follow up for 112 mon exceptone. 13of them died of their tumors but none of them experienced variceal bleeding.CONCLUSION: PTSVE is a relatively safe and effective method to treat esophageal or gastrio-fundal varices in HCCpatients with PVCT when percutaneous transhepatic varices embolization (PTHVE) of varices is impossible.展开更多
Objective This study aimed to investigate the effect of combretastatin A4 phosphate(CA4P)on proliferation,migration,and capillary tube formation of human umbilical vein endothelial cells(HUVECs)and the efficacy of tra...Objective This study aimed to investigate the effect of combretastatin A4 phosphate(CA4P)on proliferation,migration,and capillary tube formation of human umbilical vein endothelial cells(HUVECs)and the efficacy of transcatheter arterial embolization combined with CA4P in the treatment of rabbit VX2 liver tumor.Methods The effects of different concentrations of CA4P on proliferation,migration and capillary tube formation of HUVECs were investigated by cell proliferation assay,wound healing assay and capillary tube formation assay,respectively.Thirty-two rabbits implanted with liver VX2 tumors were randomly divided into 4 groups.After catheterization of the left hepatic artery,the infusion was performed using normal saline(group A),CA4P aqueous solution(group B),lipiodol and polyvinyl alcohol particles(group C),and CA4P lipiodol emulsion and polyvinyl alcohol particles(group D),respectively.Half of the animals in each group were euthanized for immunohistochemical analysis to evaluate microvessel density(MVD)at 3 days post-treatment.The other half were examined by MRI and histology to evaluate tumor growth and necrosis at 7 days post-treatment.Results CA4P could inhibit the proliferation,migration,and tube formation of HUVECs in cell experiments.After interventional treatment,the level of MVD in group D was lower than that in group C(P<0.01).The tumor volume in group C or D was lower than that in group A or B(P<0.01).The tumor necrosis rate was higher in group D than in the other groups.Conclusion The study suggests that CA4P could inhibit the proliferation,migration,and capillary tube formation of HUVECs,and transcatheter arterial embolization combined with CA4P could inhibit the growth of VX2 tumor and obviously induce tumor necrosis.展开更多
Objective To investigate the safety, feasibility, and effectiveness of uterine artery embolization in association with methotrexate(MTX) infusion for the treatment of tubal ectopic pregnancy. Methods Fifty-one patient...Objective To investigate the safety, feasibility, and effectiveness of uterine artery embolization in association with methotrexate(MTX) infusion for the treatment of tubal ectopic pregnancy. Methods Fifty-one patients with tubal ectopic pregnancy were referred for interventional management. All patients received super-selective arteriography of the uterine artery, were infused with 50–100 mg methotrexate(MTX) through a catheter, and underwent embolization of the uterine artery with a gel-foam pledge. Clinical presentation, findings of physical examination, β-HCG values, and the size of the ectopic mass were documented for comparison. The concentration of MTX in blood was evaluated at 0.5, 6, 12, 24, 36, and 48 hours after the procedure. Results Forty-seven out of the 51 patients had clinical resolution of their tubal pregnancy(92.2%). The average time for the β-HCG value to decrease and come back to normal was 9.16 ± 2.54 days(mean +/-SD). MTX levels in peripheral blood could not be detected for patients who received 50 or 75 mg MTX at 36 hours after the procedure, while the MTX level was 0.01 μmol/L at 48 hours after the procedure for patients who received 100 mg. Out of the 4 cases whose ectopic mass size was ≥5 cm, 3 failed to respond to the treatment; however, those whose ectopic mass size was ≤5 cm responded positively to the treatment, regardless of the β-HCG concentration and abdominal bleeding, except for 1 patient who had to undergo laparoscopy for severe abdominal pain and who showed a reduction in her β-HCG level. Conclusion Uterine artery embolization in association with methotrexate infusion is safe and effective in the treatment of tubal ectopic pregnancy, especially for those women with mild to moderate bleeding, or for those at risk of a major hemorrhage. The selection criterion of mass size >5 cm should, therefore, be carefully considered.展开更多
BACKGROUND Abdominoperineal excision(APE)-related hemorrhage can be challenging due to difficult access to pelvic organs and the risk of massive blood loss.The objective of the present study was to demonstrate the use...BACKGROUND Abdominoperineal excision(APE)-related hemorrhage can be challenging due to difficult access to pelvic organs and the risk of massive blood loss.The objective of the present study was to demonstrate the use of preoperative embolization(PE)as a strategy for blood preservation in a patient with a large low rectal tumor with a high risk of bleeding,scheduled for APE.CASE SUMMARY A 56-year-old man presented to our institution with a one-year history of anal bleeding and rectal tenesmus.The patient was diagnosed with bulky adenocarcinoma limited to the rectum.As the patient refused any clinical treatment,surgery without previous neoadjuvant chemoradiation was indicated.The patient underwent a tumor embolization procedure,two days before surgery performed via the right common femoral artery.The tumor was successfully devascularized and no major bleeding was noted during APE.Postoperative recovery was uneventful and a one-year follow-up showed no signs of recurrence.CONCLUSION Therapeutic tumor embolization may play a role in bloodless surgeries and increase surgical and oncologic prognoses.We describe a patient with a bulky low rectal tumor who successfully underwent preoperative embolization and bloodless abdominoperineal resection.展开更多
Transcatheter hepatic artery chemoembolization (TACE) was performed in 41 patients with hepatocellular carcinoma (HCC) accompanied with portal tumor thrombus (PTT). The primary tumors and the PTTs had been detected wi...Transcatheter hepatic artery chemoembolization (TACE) was performed in 41 patients with hepatocellular carcinoma (HCC) accompanied with portal tumor thrombus (PTT). The primary tumors and the PTTs had been detected with ultrasonography (US), computed tomography (CT) and digital subtraction angiography (DSA) before TACE. The purpose of this article is to compare the sensitivity of these methods. Eighty cases of HCC without PTT detected by DSA during the same period were studied as a control group. The PTTs were found in 37 of 41 (90.2%) cases with DSA, whereas the detection rate was 81.1% with US and 41.0% with CT. The internal left lobe of liver was invaded by tumor in 23 of 41 (56.1%) patients with PTT, but it is only 26.3% in the control group (P<001). The primary tumor located in the internal left lobe was significantly smaller than that in the right lobe (P<001). No serious dysfunction of the liver occurred during the treatment. It is concluded that DSA and US are more sensitive than CT to the detection of PTT, that tumor in the internal left lobe of the liver more easily invades the portal vein, and that TACE should be performed as actively as possible even if the portal vein has been invaded.展开更多
During post-transplant evolution, adolescents may present problems with adherence to treatment, becoming a high-risk group for graft loss. Here, we report a case which describes an adolescent patient who lost a graft ...During post-transplant evolution, adolescents may present problems with adherence to treatment, becoming a high-risk group for graft loss. Here, we report a case which describes an adolescent patient who lost a graft due to humoral rejection associated with lack of adherence to treatment. During chronic peritoneal dialysis therapy, the patient developed pain and increased volume in the graft area, fever, gross hematuria and leukocyturia upon urine examination. The patient was diagnosed with graft immune intolerance syndrome and transplantectomy was suggested. Finally, a graft embolization was performed. A decrease in symptoms was observed until the patient became asymptomatic.展开更多
Although most cases of acute nonvariceal gastrointestinal hemorrhage either spontaneously resolve or respond to medical management or endoscopic treatment,there are still a significant number of patients who require e...Although most cases of acute nonvariceal gastrointestinal hemorrhage either spontaneously resolve or respond to medical management or endoscopic treatment,there are still a significant number of patients who require emergency angiography and transcatheter treatment.Evaluation with noninvasive imaging such as nuclear scintigraphy or computed tomography may localize the bleeding source and/or confirm active hemorrhage prior to angiography.Any angiographic evaluation should begin with selective catheterization of the artery supplying the most likely site of bleeding,as determined by the available clinical,endoscopic and imaging data.If a hemorrhage source is identified,superselective catheterization followed by transcatheter microcoil embolization is usually the most effective means of successfully controlling hemorrhage while minimizing potential complications.This is now wellrecognized as a viable and safe alternative to emergency surgery.In selected situations transcatheter intra-arterial infusion of vasopressin may also be useful in controlling acute gastrointestinal bleeding.One must be aware of the various side effects and potential complications associated with this treatment,however,and recognize the high re-bleeding rate.In this article we review the current role of angiography,transcatheter arterial embolization and infusion therapy in the evaluation and management of nonvariceal gastrointestinal hemorrhage.展开更多
BACKGROUND: Following curative treatment for hepatocellular carcinoma (HCC), 50%-90% of postoperative death is due to recurrent disease. Intra-hepatic recurrence is frequently the only site of recurrence. Thus, any ne...BACKGROUND: Following curative treatment for hepatocellular carcinoma (HCC), 50%-90% of postoperative death is due to recurrent disease. Intra-hepatic recurrence is frequently the only site of recurrence. Thus, any neoadjuvant or adjuvant therapy, which can decrease or delay the incidence of intra-hepatic recurrence, or any cancer chemoprevention which can prevent a new HCC from developing in the liver remnant, will improve the results of liver resection. This article systematically reviewed the current evidence of neoadjuvant, adjuvant, and chemoprevention in partial hepatectomy of HCC. DATA SOURCES: Studies were identified by searching MEDLINE and PubMed databases for articles from January 1990 to November 2008 using the keywords 'hepatocellular carcinoma', 'hepatectomy', 'adjuvant therapy', 'neoadjuvant therapy', and 'regional therapy'. Additional papers and book chapters were identified by a manual search of the references from the key articles. RESULTS: Neoadjuvant transarterial chemoembolization or adjuvant regional transarterial chemotherapy embolization+systemic chemotherapy did not add benefit. Both adjuvant transarterial radioembolization with (131)I-lipiodol and adjuvant systemic interferon showed promising results. However, there were only a limited number of such studies. CONCLUSIONS: Further randomized controlled studies need to be carried out. Currently, there is no consensus on a standard neoadjuvant/adjuvant/chemoprevention therapy in partial hepatectomy for HCC.展开更多
Pancreatic cancer is a challenging malignancy with limited treatment options and poor life expectancy.The only curative option is surgical resection,but only 15%-20%of patients are resectable at presentation because m...Pancreatic cancer is a challenging malignancy with limited treatment options and poor life expectancy.The only curative option is surgical resection,but only 15%-20%of patients are resectable at presentation because more than 50%of patients has distant metastasis at diagnosis and the rest of them has locally advanced pancreatic cancer(LAPC).The standard of care first line treatment for LAPC patients is chemotherapy with or without radiation therapy.Recent developments in minimally invasive ablative techniques may add to the treatment armamentarium of LAPC.There are increasing number of studies evaluating these novel ablative techniques,including radiofrequency ablation,microwave ablation,cryoablation and irreversible electroporation.Most studies which included pancreatic tumor ablation,demonstrated improved overall survival in LAPC patients.However,the exact protocols are yet to set up to which stage of the treatment algorithm ablative techniques can be added and in what kind of treatment combinations.Patients with metastatic pancreatic cancer has dismal prognosis with 5-year survival is only 3%.The most common metastatic site is the liver as 90%of pancreatic cancer patients develop liver metastasis.Chemotherapy is the primary treatment option for patients with metastatic pancreatic cancer.However,when the tumor is not responding to chemotherapy or severe drug toxicity develops,locoregional liver-directed therapies can provide an opportunity to control intrahepatic disease progression and improve survival in selected patients.During the last decade new therapeutic options arose with the advancement of minimally invasive technologies to treat pancreatic cancer patients.These new therapies have been a topic of increasing interest due to the severe prognostic implications of locally advanced and metastatic pancreatic cancer and the low comorbid risk of these procedures.This review summarizes new ablative options for patients with LAPC and percutaneous liver-directed therapies for patients with liver-dominant metastatic disease.展开更多
AIM: To investigate the influence of hepatic arterial blockage on blood perfusion of transplanted cancer in rat liver and the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-1 (MMP...AIM: To investigate the influence of hepatic arterial blockage on blood perfusion of transplanted cancer in rat liver and the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-1 (MMP-1), and to explore the mechanisms involved in transarterial embolization (TAE)-induced metastasis of liver cancer preliminarily. METHODS: Walker 256 carcinosarcoma was transplanted into rat liver to establish the liver cancer model. Hepatic arterial ligation (HAL) was used to block the hepatic arterial blood supply and simulate TAE. Blood perfusion of tumor in control, laparotomy control, and HAL group was analyzed by Hoechst 33342 labeling assay, the serum VEGF level was assayed by ELISA, the expression of VEGF and MMP-1 mRNA was detected by in situ hybridization. RESULTS: Two days after HAL, the number of Hoechst 33342 labeled cells which represent the blood perfusion of tumor directly and hypoxia of tumor indirectly in HAL group decreased significantly compared with that in control group (329+/-29 vs 384+/-19, P【0.01). The serum VEGF level in the HAL group increased significantly as against that of the control group (93 ng.L(-1)+/-44 ng.L(-1) vs 55 ng.L(-1)+/-19 ng.L(-1), P【0.05). The expression of VEGF and MMP-1 mRNA in the tumor tissue of the HAL group increased significantly compared with that of the control and the laparotomy control groups (P【0.05). The blood perfusion data of the tumor, represented by the number of Hoechst 33342 labeled cells, showed a good linear inverse correlation with the serum VEGF level (r=-0.606, P【0.05) and the expression of VEGF mRNA in the tumor tissue ( r =-0.338, P【0.01). CONCLUSION: Blockage of hepatic arterial blood supply results in decreased blood perfusion and increased expression of metastasis-associated genes VEGF and MMP-1 of transplanted liver cancer in rats. Decreased blood perfusion and hypoxia may be the major cause of up-regulated expression of VEGF.展开更多
Background: Uterine arteriovenous malformation (AVM) is a rare, potentially life-threatening cause of abnormal uterine bleeding that can be acquired following a cesarean section. The diagnosis is difficult, often misd...Background: Uterine arteriovenous malformation (AVM) is a rare, potentially life-threatening cause of abnormal uterine bleeding that can be acquired following a cesarean section. The diagnosis is difficult, often misdiagnosed with retained products of conception and placenta accreta. Transarterial embolization (TAE) is a</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">n</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> efficacious and effective method of treating AVM, particularly in patients of reproductive age.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Case Report: A 41-year-old, nulliparous</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> woman</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">, started with a history of abnormal uterine bleeding 30 days after a cesarean section. She didn’t have anaemia and beta-human chorionic gonadotropin (beta-hCG) was negative. The transvaginal color Doppler ultrasound showed multiple vascular channels within myometrium showing colored mosaic patterns suggesting AVM, confirmed by Magnetic Resonance Imaging. The patient was referred to perform a Computed Tomography Angiography and right uterine artery embolization without any vascular complications.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Conclusion: AVM is a rare consequence of cesarean section but has to be considered in cases of persistent uterine bleeding in the puerperium. Embolization is a safe and effective choice treatment of AVM and an alternative and less invasive option for patients wishing to preserve fertility.展开更多
Objective To explore the efficacy of transcatheter closure of patent ductus arteriosus (PDA) with detachable coil and Amplatzer duct occluder (ADO). Methods Transcatheter colsure of PDA was performed in 160 case...Objective To explore the efficacy of transcatheter closure of patent ductus arteriosus (PDA) with detachable coil and Amplatzer duct occluder (ADO). Methods Transcatheter colsure of PDA was performed in 160 cases, aged 4.56±2.67 years, of whom 3 had residual shunt after surgical ligation, 2 had pulmomary stenosis (PS), 1 had coarctation of aorta (COA), 1 had right aortic arch, and 2 had atrial septal defect (ASD). Results Detachable coils (Duct Occlude pfm or Cook Inc) were successfully used in 51 patients with a smallest PDA diameter of 1.86±0.78mm. Amplatzer duct occluders were also successfully performed in other 109 with a moderate to large PDA diameter of 3.89±1.32mm, of whom 3 with PS or COA were performed balloon dilation firstly, and 2 with ASD were performed PDA occlusion firstly; 1 month to 4.8 years follow-up coil or Amplatzer device closure of PDA showed that neither residual shunt nor any complication. Conclusion It is suggested that the detachable coil and Amplatzer duct occluder are simple and safe for the catheter closure from small to large sized PDA.展开更多
OBJECTIVES: To analyze the technical aspects of uterine artery embolization with dextran microspheres and to evaluate the effectiveness of this technique as the primary treatment of uterine fibroids in a series of 38 ...OBJECTIVES: To analyze the technical aspects of uterine artery embolization with dextran microspheres and to evaluate the effectiveness of this technique as the primary treatment of uterine fibroids in a series of 38 patients. METHODS: Thirty-eight volunteers (age range, 24-48 years; mean, 37.2 years) with symptoms caused by uterine fibroids (menorrhagia, mass-related symptoms, and pelvic pain) were randomly included in this study. The fibroids were single in 32 patients and multiple in 6 patients. According to the tumor location, subserous fibroids were found in 4 patients and interstitial or submucosal fibroids in 34. Tumor size was from 2 to 10.9 cm in diameter. We performed embolization with a single Headhunter catheter using the right-femoral artery approach, injection of dextran microspheres (225-450 micro m), and an absorbable gelatin sponge. Follow-up included clinical and sonographic examinations at one-month intervals for 6 months. RESULTS: Embolization was successfully performed in all patients. Post-procedural pain control was good in 35 (92%) patients. In most patients, symptoms were improved at 3 months (36/38, 95%). Clinical failure of the treatment occurred in only 2 patients (2/38, 5%). Progressive reduction in leiomyoma size was revealed during sonographic follow-up, and the reduction rate at the sixth month after embolization was 68%. The tumor had vanished in five submucosal fibroid patients. Histopathological tests showed that the tumor was degenerative as fibrosis and hyalinosis. CONCLUSIONS: Uterine artery embolization with dextran microspheres is a micro-invasive method for the treatment of uterine fibroids. It is clinically effective in most patients and induces a progressive reduction in the size of fibroids. Based on this study, we believe that this new technique is much more suitable for submucosal fibroids with massive menorrhagia.展开更多
There are several options for the treatment of varicocele, including surgical repair either by open or microsurgical approach, laparoscopy, or through percutaneous embolization of the internal spermatic vein. The ulti...There are several options for the treatment of varicocele, including surgical repair either by open or microsurgical approach, laparoscopy, or through percutaneous embolization of the internal spermatic vein. The ultimate goal of varicocele treatment relies on the occlusion of the dilated veins that drain the testis. Percutaneous embolization offers a rapid recovery and can be successfully accomplished in approximately 90% of attempts. However, the technique demands interventional radiologic expertise and has potential serious complications, including vascular perforation, coil migration, and thrombosis of pampiniform plexus. This review discusses the common indications, relative contraindications, technical details, and risks associated with percutaneous embolization of varicocele.展开更多
Aneurysmal bone cyst （ABC） is a rare and benign disease that demonstrates active biological behavior,can promptly expand,and exhibits an invasive or destructive capability.1 Currently,the major therapy for ABC is co...Aneurysmal bone cyst （ABC） is a rare and benign disease that demonstrates active biological behavior,can promptly expand,and exhibits an invasive or destructive capability.1 Currently,the major therapy for ABC is complete curettage of the lesion.1,2 However,the therapy for sacral ABC has risks such as severe bleeding and nerve root damage.2 Arterial embolization is used to treat large sacral giant cell tumors and ABCs and can promptly relieve pain,reduce lesion volume,and promote osteogenesis.3展开更多
OBJECTIVE: To evaluate the safety and value of preoperative transarterial embolization of hypervascular vertebral tumors. METHODS: Sixteen patients with hypervascular vertebral tumors underwent transarterial embolizat...OBJECTIVE: To evaluate the safety and value of preoperative transarterial embolization of hypervascular vertebral tumors. METHODS: Sixteen patients with hypervascular vertebral tumors underwent transarterial embolization before surgery. The lesions were located between the middle cervical and lower lumbar spine. Forty-one arteries were embolized with permanent particles injected through a microcatheter, including polyvinyl alcohol (PVA) particles (150 - 500 micro m) in 25 arteries and Dextran particles (150 - 350 micro m) in 16. Of these, 31 had pieces of gelatin sponge added for proximal pedicled embolization. The criteria for judging the effectiveness of embolization were completeness of tumor removal and estimated blood loss during surgery. RESULTS: The particles were injected into the tumor feeders through superselection in 17 arteries or flow control in 24. Tumor embolization was defined as 'total' in five patients, 'nearly total' in eight, 'subtotal' in two, and 'partial' in another. There were no symptomatic complications associated with embolization. Tumors were entirely removed in all patients. The average estimated blood loss during surgery was 1510 ml (range of 200 - 6000 ml) for all 16 patients. CONCLUSION: Preoperative embolization of hypervascular vertebral tumors is safe and effective. It can make complete resection of a tumor possible and can make a previously unresectable tumor resectable. Superselection or flow control is necessary to achieve effective devascularization and to avoid complications.展开更多
文摘Objective To describe the transvenous catheterization technique for the treatment of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including its indications, complications and efficacy.Methods Eight patients with symptomatic CSdAVFs were treated by endovascular embolization with platinum coils, via the inferior petrosal sinus (IPS) in 6 patients, and via the Sylvian vein after surgical exposure in other 2 patients.Results Complete angiographic resolution of the fistula was obtained in six patients immediately after the procedures, and a complete resolution of symptoms and signs was achieved in all patients. The residual fistulas in two patients disappeared completely in the follow-up angiography.Conclusion Transvenous embolization is a useful and safe approach in the management of CSdAVFs.
文摘BACKGROUND Gastrointestinal bleeding(GIB)is a severe and potentially life-threatening condition,especially in cases of delayed treatment.Computed tomography angiography(CTA)plays a pivotal role in the early identification of upper and lower GIB and in the prompt treatment of the haemorrhage.AIM To determine whether a volumetric estimation of the extravasated contrast at CTA in GIB may be a predictor of subsequent positive angiographic findings.METHODS In this retrospective single-centre study,35 patients(22 men;median age 69 years;range 16-92 years)admitted to our institution for active GIB detected at CTA and further submitted to catheter angiography between January 2018 and February 2022 were enrolled.Twenty-three(65.7%)patients underwent endoscopy before CTA.Bleeding volumetry was evaluated in both arterial and venous phases via a semi-automated dedicated software.Bleeding rate was obtained from volume change between the two phases and standardised for unit time.Patients were divided into two groups,according to the angiographic signs and their concordance with CTA.RESULTS Upper bleeding accounted for 42.9%and lower GIB for 57.1%.Mean haemoglobin value at the admission was 7.7 g/dL.A concordance between positive CTA and direct angiographic bleeding signs was found in 19(54.3%)cases.Despite no significant differences in terms of bleeding volume in the arterial phase(0.55 mL vs 0.33 mL,P=0.35),a statistically significant volume increase in the venous phase was identified in the group of patients with positive angiography(2.06 mL vs 0.9 mL,P=0.02).In the latter patient group,a significant increase in bleeding rate was also detected(2.18 mL/min vs 0.19 mL/min,P=0.02).CONCLUSION In GIB of any origin,extravasated contrast volumetric analysis at CTA could be a predictor of positive angiography and may help in avoiding further unnecessary procedures.
文摘We present a 69-year-old woman with a duodenal obstruction after successful selective transcatheter arterial embolization (TAE) for a duodenal diverticular hemorrhage. Two weeks after TAE, the patient showed abrupt symptoms of duodenal obstruction. Resolving hematomas after successful selective transcatheter arterial embolization should be thoroughly observed because they might result in duodenal fibrotic encasement featuring inflammatory duodenal wall thickening, duodenal deformity, dysmotility, and fi nally obstruction.
文摘Objective:To explore the value of angiographic diagnosis and interventional therapy of the coronary artery fine branch fistula.Methods:All of the 18 patients with coronary artery fine branch fistula underwent selective coronary arteriography,7 underwent interventional therapy, while 8 underwent prosthesis for coronary artery fistula (CAF) under extracorpored circulation. Results:Among 18 cases of coronary artery fine branch fistula, 7 happened in right coronary artery (38.9%), 11 in left coronary artery (61.1%). Among the 11 cases in left coronary artery,5 happened in descending anterior branch, 5 occurred in left circumflex branch, 1 arised from both left anterior branch and left circumflex branch. Among the 18 cases, there are 10 cases of coronary-to-pulmonary artery fistula (55.6%), 5 cases of fistula draining into right atrium (27.8%), 2 cases of fistula draining into left atrium (11.1%) and 1 draining into right ventricle (5.6%). Interventional treatment was successful in 7 patients. During the 12 months’ follow-up, there was no cardiovascular events. Conclusion:Selective coronary angiography is the first choice for diagnosing the coronary artery fine branch fistula. In respect of therapy, besides of surgical treatment, intervention is still a rather good measure presently.
基金Supported by tackling key pnoblems in science and technology from the State Science and Technology Minisity,TJ99-LA01,No.96-907-03-01
文摘AIM: Clinical application and potential complication of percutaneous transsplenic varices embolization (PTSVE) of esophageal or gastrio-fundal varices in patients with hepatocellular carcinoma (HCC) complicated with portal vein cancerous thrombosis (PVCT).METHODS: 18 patients with HCC complicated with PVCT and esophageal or gastrio-fundal varices who underwent PTSVE were collected. The rate of success, complication, mortality of the procedure and postoperative complication were recorded and analyzed.RESULTS: PTSVE were successfully performed in 16 of 18cases, and the rate of success was 89%. After therapy erythrocyte counts decreased in all of the natunts. 5 of patients needed blood transfusion, 2 patients requiredsurgical intervention because of and 11 patients with ascites were alleviated by diuresis. Among these 18patients, the procedure-related mortality was 11% (2/18),one died of acute hepatic failure on the forth day after procedure, another died of acute renal failure on the fifth day. The patients were follow up for 112 mon exceptone. 13of them died of their tumors but none of them experienced variceal bleeding.CONCLUSION: PTSVE is a relatively safe and effective method to treat esophageal or gastrio-fundal varices in HCCpatients with PVCT when percutaneous transhepatic varices embolization (PTHVE) of varices is impossible.
基金supported in part by the Fundamental Research Funds for the Central Universities(No.2042015kf0104)in part by the Hubei Provincial Natural Science Foundation of China(No.2015CFB343).
文摘Objective This study aimed to investigate the effect of combretastatin A4 phosphate(CA4P)on proliferation,migration,and capillary tube formation of human umbilical vein endothelial cells(HUVECs)and the efficacy of transcatheter arterial embolization combined with CA4P in the treatment of rabbit VX2 liver tumor.Methods The effects of different concentrations of CA4P on proliferation,migration and capillary tube formation of HUVECs were investigated by cell proliferation assay,wound healing assay and capillary tube formation assay,respectively.Thirty-two rabbits implanted with liver VX2 tumors were randomly divided into 4 groups.After catheterization of the left hepatic artery,the infusion was performed using normal saline(group A),CA4P aqueous solution(group B),lipiodol and polyvinyl alcohol particles(group C),and CA4P lipiodol emulsion and polyvinyl alcohol particles(group D),respectively.Half of the animals in each group were euthanized for immunohistochemical analysis to evaluate microvessel density(MVD)at 3 days post-treatment.The other half were examined by MRI and histology to evaluate tumor growth and necrosis at 7 days post-treatment.Results CA4P could inhibit the proliferation,migration,and tube formation of HUVECs in cell experiments.After interventional treatment,the level of MVD in group D was lower than that in group C(P<0.01).The tumor volume in group C or D was lower than that in group A or B(P<0.01).The tumor necrosis rate was higher in group D than in the other groups.Conclusion The study suggests that CA4P could inhibit the proliferation,migration,and capillary tube formation of HUVECs,and transcatheter arterial embolization combined with CA4P could inhibit the growth of VX2 tumor and obviously induce tumor necrosis.
基金supported by a grant from Jiangsu Provincial Medical Youth Talent(QNRC2016711)
文摘Objective To investigate the safety, feasibility, and effectiveness of uterine artery embolization in association with methotrexate(MTX) infusion for the treatment of tubal ectopic pregnancy. Methods Fifty-one patients with tubal ectopic pregnancy were referred for interventional management. All patients received super-selective arteriography of the uterine artery, were infused with 50–100 mg methotrexate(MTX) through a catheter, and underwent embolization of the uterine artery with a gel-foam pledge. Clinical presentation, findings of physical examination, β-HCG values, and the size of the ectopic mass were documented for comparison. The concentration of MTX in blood was evaluated at 0.5, 6, 12, 24, 36, and 48 hours after the procedure. Results Forty-seven out of the 51 patients had clinical resolution of their tubal pregnancy(92.2%). The average time for the β-HCG value to decrease and come back to normal was 9.16 ± 2.54 days(mean +/-SD). MTX levels in peripheral blood could not be detected for patients who received 50 or 75 mg MTX at 36 hours after the procedure, while the MTX level was 0.01 μmol/L at 48 hours after the procedure for patients who received 100 mg. Out of the 4 cases whose ectopic mass size was ≥5 cm, 3 failed to respond to the treatment; however, those whose ectopic mass size was ≤5 cm responded positively to the treatment, regardless of the β-HCG concentration and abdominal bleeding, except for 1 patient who had to undergo laparoscopy for severe abdominal pain and who showed a reduction in her β-HCG level. Conclusion Uterine artery embolization in association with methotrexate infusion is safe and effective in the treatment of tubal ectopic pregnancy, especially for those women with mild to moderate bleeding, or for those at risk of a major hemorrhage. The selection criterion of mass size >5 cm should, therefore, be carefully considered.
文摘BACKGROUND Abdominoperineal excision(APE)-related hemorrhage can be challenging due to difficult access to pelvic organs and the risk of massive blood loss.The objective of the present study was to demonstrate the use of preoperative embolization(PE)as a strategy for blood preservation in a patient with a large low rectal tumor with a high risk of bleeding,scheduled for APE.CASE SUMMARY A 56-year-old man presented to our institution with a one-year history of anal bleeding and rectal tenesmus.The patient was diagnosed with bulky adenocarcinoma limited to the rectum.As the patient refused any clinical treatment,surgery without previous neoadjuvant chemoradiation was indicated.The patient underwent a tumor embolization procedure,two days before surgery performed via the right common femoral artery.The tumor was successfully devascularized and no major bleeding was noted during APE.Postoperative recovery was uneventful and a one-year follow-up showed no signs of recurrence.CONCLUSION Therapeutic tumor embolization may play a role in bloodless surgeries and increase surgical and oncologic prognoses.We describe a patient with a bulky low rectal tumor who successfully underwent preoperative embolization and bloodless abdominoperineal resection.
文摘Transcatheter hepatic artery chemoembolization (TACE) was performed in 41 patients with hepatocellular carcinoma (HCC) accompanied with portal tumor thrombus (PTT). The primary tumors and the PTTs had been detected with ultrasonography (US), computed tomography (CT) and digital subtraction angiography (DSA) before TACE. The purpose of this article is to compare the sensitivity of these methods. Eighty cases of HCC without PTT detected by DSA during the same period were studied as a control group. The PTTs were found in 37 of 41 (90.2%) cases with DSA, whereas the detection rate was 81.1% with US and 41.0% with CT. The internal left lobe of liver was invaded by tumor in 23 of 41 (56.1%) patients with PTT, but it is only 26.3% in the control group (P<001). The primary tumor located in the internal left lobe was significantly smaller than that in the right lobe (P<001). No serious dysfunction of the liver occurred during the treatment. It is concluded that DSA and US are more sensitive than CT to the detection of PTT, that tumor in the internal left lobe of the liver more easily invades the portal vein, and that TACE should be performed as actively as possible even if the portal vein has been invaded.
文摘During post-transplant evolution, adolescents may present problems with adherence to treatment, becoming a high-risk group for graft loss. Here, we report a case which describes an adolescent patient who lost a graft due to humoral rejection associated with lack of adherence to treatment. During chronic peritoneal dialysis therapy, the patient developed pain and increased volume in the graft area, fever, gross hematuria and leukocyturia upon urine examination. The patient was diagnosed with graft immune intolerance syndrome and transplantectomy was suggested. Finally, a graft embolization was performed. A decrease in symptoms was observed until the patient became asymptomatic.
文摘Although most cases of acute nonvariceal gastrointestinal hemorrhage either spontaneously resolve or respond to medical management or endoscopic treatment,there are still a significant number of patients who require emergency angiography and transcatheter treatment.Evaluation with noninvasive imaging such as nuclear scintigraphy or computed tomography may localize the bleeding source and/or confirm active hemorrhage prior to angiography.Any angiographic evaluation should begin with selective catheterization of the artery supplying the most likely site of bleeding,as determined by the available clinical,endoscopic and imaging data.If a hemorrhage source is identified,superselective catheterization followed by transcatheter microcoil embolization is usually the most effective means of successfully controlling hemorrhage while minimizing potential complications.This is now wellrecognized as a viable and safe alternative to emergency surgery.In selected situations transcatheter intra-arterial infusion of vasopressin may also be useful in controlling acute gastrointestinal bleeding.One must be aware of the various side effects and potential complications associated with this treatment,however,and recognize the high re-bleeding rate.In this article we review the current role of angiography,transcatheter arterial embolization and infusion therapy in the evaluation and management of nonvariceal gastrointestinal hemorrhage.
文摘BACKGROUND: Following curative treatment for hepatocellular carcinoma (HCC), 50%-90% of postoperative death is due to recurrent disease. Intra-hepatic recurrence is frequently the only site of recurrence. Thus, any neoadjuvant or adjuvant therapy, which can decrease or delay the incidence of intra-hepatic recurrence, or any cancer chemoprevention which can prevent a new HCC from developing in the liver remnant, will improve the results of liver resection. This article systematically reviewed the current evidence of neoadjuvant, adjuvant, and chemoprevention in partial hepatectomy of HCC. DATA SOURCES: Studies were identified by searching MEDLINE and PubMed databases for articles from January 1990 to November 2008 using the keywords 'hepatocellular carcinoma', 'hepatectomy', 'adjuvant therapy', 'neoadjuvant therapy', and 'regional therapy'. Additional papers and book chapters were identified by a manual search of the references from the key articles. RESULTS: Neoadjuvant transarterial chemoembolization or adjuvant regional transarterial chemotherapy embolization+systemic chemotherapy did not add benefit. Both adjuvant transarterial radioembolization with (131)I-lipiodol and adjuvant systemic interferon showed promising results. However, there were only a limited number of such studies. CONCLUSIONS: Further randomized controlled studies need to be carried out. Currently, there is no consensus on a standard neoadjuvant/adjuvant/chemoprevention therapy in partial hepatectomy for HCC.
文摘Pancreatic cancer is a challenging malignancy with limited treatment options and poor life expectancy.The only curative option is surgical resection,but only 15%-20%of patients are resectable at presentation because more than 50%of patients has distant metastasis at diagnosis and the rest of them has locally advanced pancreatic cancer(LAPC).The standard of care first line treatment for LAPC patients is chemotherapy with or without radiation therapy.Recent developments in minimally invasive ablative techniques may add to the treatment armamentarium of LAPC.There are increasing number of studies evaluating these novel ablative techniques,including radiofrequency ablation,microwave ablation,cryoablation and irreversible electroporation.Most studies which included pancreatic tumor ablation,demonstrated improved overall survival in LAPC patients.However,the exact protocols are yet to set up to which stage of the treatment algorithm ablative techniques can be added and in what kind of treatment combinations.Patients with metastatic pancreatic cancer has dismal prognosis with 5-year survival is only 3%.The most common metastatic site is the liver as 90%of pancreatic cancer patients develop liver metastasis.Chemotherapy is the primary treatment option for patients with metastatic pancreatic cancer.However,when the tumor is not responding to chemotherapy or severe drug toxicity develops,locoregional liver-directed therapies can provide an opportunity to control intrahepatic disease progression and improve survival in selected patients.During the last decade new therapeutic options arose with the advancement of minimally invasive technologies to treat pancreatic cancer patients.These new therapies have been a topic of increasing interest due to the severe prognostic implications of locally advanced and metastatic pancreatic cancer and the low comorbid risk of these procedures.This review summarizes new ablative options for patients with LAPC and percutaneous liver-directed therapies for patients with liver-dominant metastatic disease.
基金Science and Technology Development Fund of Shanghai Municipality,No.004119086
文摘AIM: To investigate the influence of hepatic arterial blockage on blood perfusion of transplanted cancer in rat liver and the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-1 (MMP-1), and to explore the mechanisms involved in transarterial embolization (TAE)-induced metastasis of liver cancer preliminarily. METHODS: Walker 256 carcinosarcoma was transplanted into rat liver to establish the liver cancer model. Hepatic arterial ligation (HAL) was used to block the hepatic arterial blood supply and simulate TAE. Blood perfusion of tumor in control, laparotomy control, and HAL group was analyzed by Hoechst 33342 labeling assay, the serum VEGF level was assayed by ELISA, the expression of VEGF and MMP-1 mRNA was detected by in situ hybridization. RESULTS: Two days after HAL, the number of Hoechst 33342 labeled cells which represent the blood perfusion of tumor directly and hypoxia of tumor indirectly in HAL group decreased significantly compared with that in control group (329+/-29 vs 384+/-19, P【0.01). The serum VEGF level in the HAL group increased significantly as against that of the control group (93 ng.L(-1)+/-44 ng.L(-1) vs 55 ng.L(-1)+/-19 ng.L(-1), P【0.05). The expression of VEGF and MMP-1 mRNA in the tumor tissue of the HAL group increased significantly compared with that of the control and the laparotomy control groups (P【0.05). The blood perfusion data of the tumor, represented by the number of Hoechst 33342 labeled cells, showed a good linear inverse correlation with the serum VEGF level (r=-0.606, P【0.05) and the expression of VEGF mRNA in the tumor tissue ( r =-0.338, P【0.01). CONCLUSION: Blockage of hepatic arterial blood supply results in decreased blood perfusion and increased expression of metastasis-associated genes VEGF and MMP-1 of transplanted liver cancer in rats. Decreased blood perfusion and hypoxia may be the major cause of up-regulated expression of VEGF.
文摘Background: Uterine arteriovenous malformation (AVM) is a rare, potentially life-threatening cause of abnormal uterine bleeding that can be acquired following a cesarean section. The diagnosis is difficult, often misdiagnosed with retained products of conception and placenta accreta. Transarterial embolization (TAE) is a</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">n</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> efficacious and effective method of treating AVM, particularly in patients of reproductive age.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Case Report: A 41-year-old, nulliparous</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> woman</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">, started with a history of abnormal uterine bleeding 30 days after a cesarean section. She didn’t have anaemia and beta-human chorionic gonadotropin (beta-hCG) was negative. The transvaginal color Doppler ultrasound showed multiple vascular channels within myometrium showing colored mosaic patterns suggesting AVM, confirmed by Magnetic Resonance Imaging. The patient was referred to perform a Computed Tomography Angiography and right uterine artery embolization without any vascular complications.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Conclusion: AVM is a rare consequence of cesarean section but has to be considered in cases of persistent uterine bleeding in the puerperium. Embolization is a safe and effective choice treatment of AVM and an alternative and less invasive option for patients wishing to preserve fertility.
文摘Objective To explore the efficacy of transcatheter closure of patent ductus arteriosus (PDA) with detachable coil and Amplatzer duct occluder (ADO). Methods Transcatheter colsure of PDA was performed in 160 cases, aged 4.56±2.67 years, of whom 3 had residual shunt after surgical ligation, 2 had pulmomary stenosis (PS), 1 had coarctation of aorta (COA), 1 had right aortic arch, and 2 had atrial septal defect (ASD). Results Detachable coils (Duct Occlude pfm or Cook Inc) were successfully used in 51 patients with a smallest PDA diameter of 1.86±0.78mm. Amplatzer duct occluders were also successfully performed in other 109 with a moderate to large PDA diameter of 3.89±1.32mm, of whom 3 with PS or COA were performed balloon dilation firstly, and 2 with ASD were performed PDA occlusion firstly; 1 month to 4.8 years follow-up coil or Amplatzer device closure of PDA showed that neither residual shunt nor any complication. Conclusion It is suggested that the detachable coil and Amplatzer duct occluder are simple and safe for the catheter closure from small to large sized PDA.
文摘OBJECTIVES: To analyze the technical aspects of uterine artery embolization with dextran microspheres and to evaluate the effectiveness of this technique as the primary treatment of uterine fibroids in a series of 38 patients. METHODS: Thirty-eight volunteers (age range, 24-48 years; mean, 37.2 years) with symptoms caused by uterine fibroids (menorrhagia, mass-related symptoms, and pelvic pain) were randomly included in this study. The fibroids were single in 32 patients and multiple in 6 patients. According to the tumor location, subserous fibroids were found in 4 patients and interstitial or submucosal fibroids in 34. Tumor size was from 2 to 10.9 cm in diameter. We performed embolization with a single Headhunter catheter using the right-femoral artery approach, injection of dextran microspheres (225-450 micro m), and an absorbable gelatin sponge. Follow-up included clinical and sonographic examinations at one-month intervals for 6 months. RESULTS: Embolization was successfully performed in all patients. Post-procedural pain control was good in 35 (92%) patients. In most patients, symptoms were improved at 3 months (36/38, 95%). Clinical failure of the treatment occurred in only 2 patients (2/38, 5%). Progressive reduction in leiomyoma size was revealed during sonographic follow-up, and the reduction rate at the sixth month after embolization was 68%. The tumor had vanished in five submucosal fibroid patients. Histopathological tests showed that the tumor was degenerative as fibrosis and hyalinosis. CONCLUSIONS: Uterine artery embolization with dextran microspheres is a micro-invasive method for the treatment of uterine fibroids. It is clinically effective in most patients and induces a progressive reduction in the size of fibroids. Based on this study, we believe that this new technique is much more suitable for submucosal fibroids with massive menorrhagia.
文摘There are several options for the treatment of varicocele, including surgical repair either by open or microsurgical approach, laparoscopy, or through percutaneous embolization of the internal spermatic vein. The ultimate goal of varicocele treatment relies on the occlusion of the dilated veins that drain the testis. Percutaneous embolization offers a rapid recovery and can be successfully accomplished in approximately 90% of attempts. However, the technique demands interventional radiologic expertise and has potential serious complications, including vascular perforation, coil migration, and thrombosis of pampiniform plexus. This review discusses the common indications, relative contraindications, technical details, and risks associated with percutaneous embolization of varicocele.
文摘Aneurysmal bone cyst （ABC） is a rare and benign disease that demonstrates active biological behavior,can promptly expand,and exhibits an invasive or destructive capability.1 Currently,the major therapy for ABC is complete curettage of the lesion.1,2 However,the therapy for sacral ABC has risks such as severe bleeding and nerve root damage.2 Arterial embolization is used to treat large sacral giant cell tumors and ABCs and can promptly relieve pain,reduce lesion volume,and promote osteogenesis.3
文摘OBJECTIVE: To evaluate the safety and value of preoperative transarterial embolization of hypervascular vertebral tumors. METHODS: Sixteen patients with hypervascular vertebral tumors underwent transarterial embolization before surgery. The lesions were located between the middle cervical and lower lumbar spine. Forty-one arteries were embolized with permanent particles injected through a microcatheter, including polyvinyl alcohol (PVA) particles (150 - 500 micro m) in 25 arteries and Dextran particles (150 - 350 micro m) in 16. Of these, 31 had pieces of gelatin sponge added for proximal pedicled embolization. The criteria for judging the effectiveness of embolization were completeness of tumor removal and estimated blood loss during surgery. RESULTS: The particles were injected into the tumor feeders through superselection in 17 arteries or flow control in 24. Tumor embolization was defined as 'total' in five patients, 'nearly total' in eight, 'subtotal' in two, and 'partial' in another. There were no symptomatic complications associated with embolization. Tumors were entirely removed in all patients. The average estimated blood loss during surgery was 1510 ml (range of 200 - 6000 ml) for all 16 patients. CONCLUSION: Preoperative embolization of hypervascular vertebral tumors is safe and effective. It can make complete resection of a tumor possible and can make a previously unresectable tumor resectable. Superselection or flow control is necessary to achieve effective devascularization and to avoid complications.
