Efficacy of radiofrequency ablation in treatment of complicated pyogenic liver abscess / 中华肝胆外科杂志

Objective To evaluate the efficacy of radiofrequency ablation (RFA) in treatment of complicated pyogenic liver abscess (PLA).Methods A retrospective analysis was conducted on 20 patients with complicated PLA treated from August 2010 to January 2018 in the West Campus of Beijing Chao-yang Hospital which is Affiliated to the Capital Medical University and Rizhao Central Hospital of Shandong Province.These patients were treated with RFA based treatment modalities using CT-guided or laparoscopy combined with Ultrasound-guided RFA.The successful rate,efficacious rate and safety of RFA were respectively analyzed.Routine follow-up was carried out after treatment.Results The successful rate of RFA was 100％.The median operation time was 45 minutes.All the 20 patients were cured by one session of RFA.The multilocular lesion in one patient was converted to a unilocular lesion after one session of RFA.The patient was then cured by percutaneous hepatic abscess drainage.No serious complications were observed.Conclusions RFA was safe and efficacious.It should be considered as an alternative treatment for patients with complicated PLA who were not responsive to,or not applicable to antibiotics treatment and radiological intervention.

Subperiosteal Osteoid Osteoma of the Knee: Case Report

Osteoid osteoma, a frequent lesions of bone, is usually intraosseous but occasionally subperiosteal. We describe the case of a 19-year-old male with knee pain caused by subperiosteal osteoid osteoma. Radiologic evaluation was performed with radiographic, computed tomography (CT), ultrasonographic (US) and magnetic resonance imaging (MRI). But the preoperative diagnosis of osteoid osteoma was delayed because of unusual imaging findings and atypical symptom. After excisional biopsy, histological examination confirmed the diagnosis of osteoid osteoma. The lesion was treated successfully with CT-guided radiofrequency ablation.

Risk factors for 302 hepatic malignancies cases with residual tumor after ultrasound-guided radiofrequency ablation treatment / 中国癌症杂志

Background and purpose: Radiofrequency ablation (RFA) is one of the effective treatment methods for primary liver cancer and metastatic liver cancer. The purpose of this study was to investigate the risk factors of residual tumor after RFA for hepatic malignancies. Methods:A total number of 302 hepatic malignancies cases with 691 tumors after ultrasound-guided RFA from Jan. 2010 to Mar. 2013 were retrospectively analyzed. Single factor and multi-factor Logistic regression model were used to analyze the risk factors of residual tumor after RFA. Results:Complete ablation cases were 90.07%(272/302) for patients and 91.46%(632/691) for tumors, and the ablation residual rate was 8.54%. Ablation residual rates for tumor ≤3 cm, 3-5 cm and >5 cm in diameter were 6.30%, 9.57% and 28.57%, for tumor close to the intrahepatic vascular and gallbladder were 17.14%and 18.52%, for with and without combination with other local treatments were 7.02%and 13.41%, respectively. Multivariate analysis showed that tumor size>5 cm (P=0.044), proximity to large vessel (P=0.039) and without combination with other local treatments (P=0.001) were independent risk factors for ablation residual. Multivariate analysis showed that tumor near the intrahepatic vascular (P=0.014), single needle RFA (P=0.047) and without combination with other local treatments (P=0.023) were independent ablation residua risk factors for tumors between 3-5 cm in maximum diameter. Conclusion:Ultrasound-guided RFA can achieve satisfactory ablation effect. Tumor close to the intrahepatic vascular, tumor diameter>5 cm and without combination with other local treatment act as the independent risk factors for ablation residual. For tumors between 3-5 cm in diameter, in addition to close to intrahepatic blood vessels and without combination with other local treatment, single needle RFA is also another independent risk factor for ablation residual, and double-needle or multi-needle treatment can improve the ablation efifciency and reduce residual rate.

Hypertensive crisis during percutaneous radiofrequency ablation of a metastatic adrenal tumor under general anesthesia: A case report

Radiofrequency ablation (RFA) has been used as an alternative method of surgical treatment to treat neoplasms of variable body organs. In considerable proportion of RFA cases, anesthesiologists are asked to conduct general anesthesia. RFA has been known to be a safe and effective treatment, however injury to adjacent normal tissue during RFA develops serious complications. In particular, unintended injury to normal adrenal tissue of adrenal tumors can cause severe complications such as hypertensive crisis due to excessive secretion of catecholamine. However, serious complications of primary or metastatic adrenal tumors have been rarely reported due to RFA. We report a case of hypertensive crisis with associated tachycardia and ventricular arrhythmia during RFA of hepatocellular carcinoma metastatic to the adrenal gland.

CT-guided radiofrequency ablation of VX2 lung tumors in rabbits / 中国癌症杂志

10.3969/j.issn.1007-3969.2013.05.005

Radiofrequency Ablation for Benign Thyroid Nodules Performed by Surgeon / 대한내분비외과학회지

PURPOSE: The ability to apply radiofrequency ablation (RFA) has provided for a greater diversity of approaches for treatment of benign thyroid nodules. This study evaluated the efficacy and safety of RFA performed by a surgeon. METHODS: From January 2009 to November 2010, a total of 47 benign thyroid nodules were treated with RFA performed by one surgeon. Nodular patterns were divided into mainly cystic, mixed, and mainly solid (soft solid, hard solid) nodules, and ultrasonography was performed for assessment of the volume-reduction radio (VRR) of each nodule. Follow-up ultrasonography was performed three to 19 months after ablation. And complication was observed. One session of RFA was performed. RESULTS: The median volume before ablation was 7.8 cm³ (range 1.3~43.2 cm³). After ablation, the median volume was 0.9 cm³ (range 0.0-21.6 cm³) and VRR was 81.5±17.3%. RFA in mainly cystic nodules resulted in significant decreases in VRR (93.7±5.0%, P=0.009). It was the largest among the nodular types. VRR was 81.4±13.1% in mixed nodules, 77.2±19.2% in mainly solid nodules, 85.9±11.0% in soft solid nodules, and 54.2±17.3% in hard solid nodules 95.7% of nodules (45 nodules) showed more than 50% reduction, while the two remaining nodules, which were hard solid nodules, showed less than 50% reduction. Complications included pain, voice change, nausea, and transient voice change. CONCLUSION: Results of this study demonstrated the safety and effectiveness of RFA performed by a surgeon for reducing nodule volume.

Radiofrequency Ablation Modified Maze Procedure during Open-heart Surgery for Atrial Fibrillation / 中国微创外科杂志

55 mm or course of AF over 2 years [54.5%(24/44) and 68.7%(46/67),?2=29.265,P=0.000 and ?2=13.814,P=0.000].Conclusion RFA Maze Ⅲ procedure during open-heart surgery is safe and effective for patients with AF.