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Radiofrequency lesioning

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https://www.readbyqxmd.com/read/28068959/pancreatic-neuroendocrine-tumor-with-metastasis-to-the-spleen-a-case-report
#1
Yasunaru Sakuma, Yoshikazu Yasuda, Naohiro Sata, Yoshinori Hosoya, Atsushi Shimizu, Hirofumi Fujii, Daisuke Matsubara, Noriyuki Fukushima, Atsushi Miki, Misato Maeno, Alan Kawarai Lefor
BACKGROUND: Long-term term survival in patients with pancreatic neuroendocrine tumors has been reported, even in patients with metastatic disease. Metastases to the spleen are extremely rare, but have been reported from a number of primary malignancies, such as breast cancer, lung cancer, melanoma and ovarian cancer. This is the first report of a splenic metastasis from a primary pancreatic neuroendocrine tumor. CASE PRESENTATION: The patient presented as a 53 years old white male with anemia and fatigue...
January 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28062897/the-results-of-ultrasonography-guided-percutaneous-radiofrequency-ablation-in-hyperparathyroid-patients-in-whom-surgery-is-not-feasible
#2
Ismail Cem Sormaz, Arzu Poyanlı, Sami Açar, Ahmet Yalın İşcan, İlker Ozgur, Fatih Tunca, Yasemin Giles Senyürek
BACKGROUND: The aim of the study was to evaluate the results of ultrasonography (US)-guided percutaneous radiofrequency ablation (RFA) in hyperparathyroid patients who refused surgery or had high surgical risks. PATIENTS AND METHODS: Five patients with hyperparathyroidism (HPT) underwent US-guided RFA for a single hyperfunctioning parathyroid lesion. Post-ablation serum calcium and parathormone (PTH) assays were performed. All patients underwent imaging studies 6 months after the ablation to visualize the post-ablation change in the size of the treated parathyroid lesions...
January 6, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28054137/-local-treatment-of-solitary-intrapulmonary-malignant-nodules
#3
J Op den Winkel, F Eichhorn, S Rieken, H Dienemann
DEFINITION: Intrapulmonary nodules generally represent an incidental finding in the roentgenogram or computed tomography (CT) scan of the chest. They are defined as single, well-circumscribed, radiographic opaque lesions that measures up to 3 cm in diameter and are surrounded completely by aerated lung. The probability of malignancy directly correlates with increasing diameter. Lesions that have a diameter of 1 cm or larger require direct evaluation. THERAPY: Surgery is the first option for patients with a malignant lesion, given an acceptable perioperative risk; for high-risk patients either radiofrequency ablation (RFA) or stereotactic body radiation therapy (SBRT) should be offered...
January 4, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28050693/technical-success-technique-efficacy-and-complications-of-minimally-invasive-imaging-guided-percutaneous-ablation-procedures-of-breast-cancer-a-systematic-review-and-meta-analysis
#4
Giovanni Mauri, Luca Maria Sconfienza, Lorenzo Carlo Pescatori, Maria Paola Fedeli, Marco Alì, Giovanni Di Leo, Francesco Sardanelli
OBJECTIVES: To systematically review studies concerning imaging-guided minimally-invasive breast cancer treatments. METHODS: An online database search was performed for English-language articles evaluating percutaneous breast cancer ablation. Pooled data and 95% confidence intervals (CIs) were calculated. Technical success, technique efficacy, minor and major complications were analysed, including ablation technique subgroup analysis and effect of tumour size on outcome...
January 3, 2017: European Radiology
https://www.readbyqxmd.com/read/28042519/potential-of-radiofrequency-ablation-in-combination-with-immunotherapy-in-the-treatment-of-hepatocellular-carcinoma
#5
Guangfu Li, Kevin F Staveley-O'Carroll, Eric T Kimchi
Radiofrequency ablation (RFA) is an important treatment option for patients with early hepatocellular carcinoma (HCC). RFA offers a reliable, reproducible modality to effectively treat hepatic lesions with minimal collateral damage to the surrounding hepatic parenchyma. In addition to traditional open operative techniques, RFA can be performed percutaneously or laparoscopically to minimize the physiologic insult to the patient. Due to the concomitant hepatic damage and dysfunction that often is present in patients with HCC these factors make RFA a frequently utilized therapeutic option...
April 2016: Journal of Clinical Trials
https://www.readbyqxmd.com/read/28038779/usefulness-of-combined-bi-rads-analysis-and-nakagami-statistics-of-ultrasound-echoes-in-the-diagnosis-of-breast-lesions
#6
K Dobruch-Sobczak, H Piotrzkowska-Wróblewska, K Roszkowska-Purska, A Nowicki, W Jakubowski
AIM: To develop a method combining the statistics of the ultrasound backscatter and the Breast Imaging-Reporting and Data System (BI-RADS) classification to enhance the differentiation of breast tumours. MATERIALS AND METHODS: The Nakagami shape parameter m was used to characterise the scatter properties of breast tumours. Raw data from the radiofrequency (RF) echo-signal and B-mode images from 107 (32 malignant and 75 benign) lesions and their surrounding tissue were recorded...
December 27, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/28034569/evaluation-of-hepatocellular-carcinoma-tumor-vascularity-using-contrast-enhanced-ultrasonography-as-a-predictor-for-local-recurrence-following-radiofrequency-ablation
#7
Tomohiro Ishii, Kazushi Numata, Yoshiteru Hao, Nobutaka Doba, Koji Hara, Masaaki Kondo, Katsuaki Tanaka, Shin Maeda
PURPOSE: The purpose of this study was to evaluate whether the hypervascularity of hepatocellular carcinomas (HCCs) on contrast-enhanced ultrasonography (CEUS) prior to radiofrequency ablation (RFA) is a significant risk factor for local recurrence after RFA. MATERIALS AND METHODS: Institutional review board approval and informed consent were obtained. Overall, 208 patients (mean age, 71.7 years; range, 50-87 years; 137 men, 71 women) with 282 HCCs treated with RFA were analyzed retrospectively...
December 21, 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/28028574/prospective-pilot-study-of-ct-guided-microwave-ablation-in-the-treatment-of-osteoid-osteomas
#8
Clara Prud'homme, Jean-Philippe Nueffer, Michel Runge, Jonathan Dubut, Bruno Kastler, Sébastien Aubry
PURPOSE: The aims of this work were to assess the feasibility and efficacy of CT-guided microwave ablation (MWA) in the treatment of osteoid osteomas (OOs). MATERIALS AND METHODS: Thirteen consecutive patients (range 11-31 years old) presenting with OO were prospectively included and treated by CT-guided MWA. Power and duration of MWA were both recorded. The patient's pain was assessed using a numeric pain rating scale (NRS), and side effects were recorded during procedures, after 1 day, 7 days and 1 month...
December 27, 2016: Skeletal Radiology
https://www.readbyqxmd.com/read/28012050/comparative-assessment-of-plaque-media-change-on-three-modalities-of-ivus-immediately-after-implantation-of-either-everolimus-eluting-bioresorbable-vascular-scaffold-or-everolimus-eluting-metallic-stent-in-absorb-ii-study
#9
Yaping Zeng, Rafael Cavalcante, Erhan Tenekecioglu, Pannipa Suwannasom, Yohei Sotomi, Carlos Collet, Mahammad Abdelghani, Hans Jonker, Franck Digne, Dieter Horstkotte, Manfred Zehender, Ciro Indolfi, Francesco Saia, Rosario Fiorilli, Bernard Chevalier, Leonardo Bolognese, Javier Goicolea, Shaoping Nie, Yoshinobu Onuma, Patrick W Serruys
The purpose of the study to assess the comparability of immediate changes in plaque/media volume (PV) on three modalities of intravascular ultrasound (IVUS) after implantation of either bioresorbable vascular scaffold (BVS) or everolimus-eluting metallic stent (EES) in Absorb II Study. The two devices have different device volume and ultrasound backscattering that may interfere with the "plaque/media" assessed by three modalities on IVUS: grayscale, backscattering of radiofrequency and brightness function. In a multicenter randomized controlled trial, 501 patients with stable or unstable angina underwent documentary IVUS pre- and post- implantation...
December 23, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28009767/transient-sensory-recovery-in-stroke-patients-after-pulsed-radiofrequency-electrical-stimulation-on-dorsal-root-ganglia-a-case-series
#10
Seza Apiliogullari, Ilknur A Gezer, Funda Levendoglu
INTRODUCTION: The integrity of the somatosensory system is important for motor recovery and neuroplasticity after strokes. Peripheral stimulation or central stimulation in patients with central nervous system lesions can be an effective modality in improving function and in facilitating neuroplasticity. CASE REPORT: We present 2 hemiplegic cases with sensory motor deficit and the result of the pulsed radiofrequency (PRF) electrical stimulation to the dorsal root ganglia...
January 2017: Neurologist
https://www.readbyqxmd.com/read/28008468/localizing-small-lung-lesions-in-video-assisted-thoracoscopic-surgery-via-radiofrequency-identification-marking
#11
Yojiro Yutaka, Toshihiko Sato, Jitian Zhang, Koichi Matsushita, Hiroyuki Aiba, Yusuke Muranishi, Yasuto Sakaguchi, Teruya Komatsu, Fumitsugu Kojima, Tatsuo Nakamura, Hiroshi Date
BACKGROUND: To facilitate accurate localization of small lung lesions in thoracoscopic surgery, we employed a micro-radiofrequency identification tag designed to be delivered through the 2-mm working channel of a flexible bronchoscope. This report presents the results of preclinical studies of our novel localizing technique in a canine model. METHODS: To evaluate functional placement, three types of tags [Group A, tag alone (n = 18); Group B, tag + resin anchor (n = 15); and Group C, tag + NiTi coil anchor (n = 15)] were bronchoscopically placed in subpleural areas and subsegmental bronchi via our new delivery device; tags were examined radiographically on days 0-7 and day 14...
December 23, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/27999917/radiofrequency-ablation-combined-with-hepatic-arterial-chemoembolization-using-degradable-starch-microsphere-mixed-with-mitomycin-c-for-the-treatment-of-liver-metastasis-from-colorectal-cancer-a-prospective-multicenter-study
#12
Koichiro Yamakado, Yasutaka Inaba, Yozo Sato, Taku Yasumoto, Sadao Hayashi, Takashi Yamanaka, Koji Nobata, Haruyuki Takaki, Atsuhiro Nakatsuka
PURPOSE: This phase II prospective study investigates possible benefits of radiofrequency ablation (RFA) combined with hepatic arterial chemoembolization using degradable starch microsphere (DSM) mixed with mitomycin C (MMC) in non-surgical candidates with colorectal liver metastases. MATERIALS AND METHODS: This study, approved by the respective institutional review board, included non-surgical candidates with 3 or fewer liver tumors of 3 cm or smaller, or a single lesion 5 cm or smaller...
December 20, 2016: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/27999692/polypoid-dysplasia-in-barrett-s-esophagus-diagnosis-management-and-very-different-outcomes-in-two-consecutive-cases
#13
Megan Murphy, Christina Tofani, Kunjal Gandhi, Anthony Infantolino
Background. Barrett's esophagus is associated with an increased risk of adenocarcinoma. Dysplasia in Barrett's esophagus is a precursor to adenocarcinoma. Rarely, dysplastic polypoid lesions are superimposed on Barrett's esophagus. Most reported cases of polypoid dysplasia in Barrett's esophagus have been advanced on presentation and treated with esophagectomy. We describe two cases of polypoid changes in Barrett's esophagus and treatment with polypectomy followed by radiofrequency ablation. Cases. A 75 yo male presented with esophageal polyps, which on biopsy showed gastric cardia/foveolar mucosa with focal intestinal metaplasia without dysplasia...
2016: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/27989228/-thermoablation-therapy-in-the-treatment-of-benign-lesions
#14
Pál Ákos Deák, Dávid Ádám Korda, Attila Doros
INTRODUCTION: Depending on their size and location, some benign tumors can cause prolonged discomfort and even rupture and fatal bleeding in severe cases. Hitherto the therapeutic strategies for such lesions were observation, surgery and in selected cases transarterial embolization. AIM: Our aim was to present the possibilities of thermoablation for treating lesions. METHOD: Here we present interventions of four patients in Semmelweis University Department of Transplantation and Surgery...
December 2016: Orvosi Hetilap
https://www.readbyqxmd.com/read/27974714/contrast-enhanced-tissue-harmonic-imaging-versus-phase-inversion-harmonic-sonographic-imaging-for-the-delineation-of-hepatocellular-carcinomas
#15
Masashi Kono, Yasunori Minami, Mina Iwanishi, Tomohiro Minami, Hirokazu Chishina, Tadaaki Arizumi, Yoriaki Komeda, Toshiharu Sakurai, Masahiro Takita, Norihisa Yada, Hiroshi Ida, Satoru Hagiwara, Kazuomi Ueshima, Naoshi Nishida, Masatoshi Kudo
OBJECTIVE: To compare contrast tissue harmonic imaging (THI) with low mechanical index (MI) and conventional contrast harmonic imaging (CHI) with respect to lesion visibility of hepatocellular carcinoma (HCC). METHODS: One hundred and twenty-five patients (84 men and 41 women, age range 39-94 years, mean age 74 years) with 100 naïve HCCs and 30 lesions after radiofrequency ablation (RFA) for HCC were evaluated. One hundred and four patients had liver cirrhosis of Child-Pugh class A, and the remaining 21 had Child-Pugh class B cirrhosis...
December 15, 2016: Oncology
https://www.readbyqxmd.com/read/27943352/electrode-contact-force-controlled-bipolar-radiofrequency-ablation-different-effects-on-lesion-size-between-dual-and-single-bath-preparations
#16
Masaomi Chinushi, Osamu Saitoh, Junya Watanabe, Ayari Sugai, Katsuya Suzuki, Yukio Hosaka, Hiroshi Furushima
BACKGROUND: During bipolar (BIP) radiofrequency (RF) ablation using 2 catheters in humans, each catheter is placed in separate cardiac chambers or spaces. We developed a contact force-controlled experimental preparation, and compared measurements made with 2 catheters placed in a single bath (SB), versus each catheter placed in separate baths, in order to assess the preparation-dependent differences in the results of BIP-RF ablation. METHODS: In the SB experiments, a porcine heart was placed in the center of the bath, while in the dual bath (DB) experiments, it was placed between 2 half baths communicating through windows...
December 10, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27931834/treatments-for-colorectal-liver-metastases-a-new-focus-on-a-familiar-concept
#17
REVIEW
M G Zampino, E Magni, P S Ravenda, C A Cella, G Bonomo, P Della Vigna, S Galdy, F Spada, G M Varano, G Mauri, N Fazio, F Orsi
A major challenge for the management of advanced-colorectal-cancer is the multidisciplinary approach required for the treatment of liver metastases. Reducing the burden of liver metastases with liver-directed therapy has an important impact on both survival and health-related quality of life. This paper debates the rationale and current liver-directed approaches for colorectal liver metastases based on the evidence of literature and new clinical trials. Surgery is the gold standard, when feasible, and it's the main treatment goal for patients with potentially-resectable disease as a means of prolonging progression-free survival...
December 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27930718/seeing-the-invisible-revealing-atrial-ablation-lesions-using-hyperspectral-imaging-approach
#18
Narine Muselimyan, Luther M Swift, Huda Asfour, Tigran Chahbazian, Ramesh Mazhari, Marco A Mercader, Narine A Sarvazyan
BACKGROUND: Currently, there are limited means for high-resolution monitoring of tissue injury during radiofrequency ablation procedures. OBJECTIVE: To develop the next generation of visualization catheters that can reveal irreversible atrial muscle damage caused by ablation and identify viability gaps between the lesions. METHODS: Radiofrequency lesions were placed on the endocardial surfaces of excised human and bovine atria and left ventricles of blood perfused rat hearts...
2016: PloS One
https://www.readbyqxmd.com/read/27930603/strategies-to-improve-the-efficacy-of-epicardial-linear-ablation-on-the-beating-heart
#19
Yoshiyuki Watanabe, Matthew R Schill, Toshinobu Kazui, Spencer J Melby, Richard B Schuessler, Ralph J Damiano
OBJECTIVE: Creating transmural linear lesions on the beating heart is an important component of minimally invasive surgical ablation for atrial fibrillation. Animal studies have shown poor efficacy for surface bipolar radiofrequency ablation (RFA). Clinicians have developed strategies including multiple device applications and vena caval occlusion (VCO) to improve ablation efficacy. These techniques were evaluated in an acute porcine model. METHODS: In the first experiment, an RFA device was used to perform two 40-second epicardial ablations on the right atrium of six pigs...
November 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27928458/anatomical-hepatectomy-for-liver-metastasis-from-rectal-adenocarcinoma-presenting-with-intrabiliary-extension-a-case-report
#20
Tetsuo Kon, Hideo Suzuki, Tatsuya Kawaguchi, Kazuyuki Gyoten, Hideki Machishi, Takashi Kurumiya, Yoshikatsu Okada
Liver metastases from colorectal carcinoma commonly form nodular lesions in the liver parenchyma. We report a case of liver metastasis from rectal adenocarcinoma that extended predominantly into the bile duct. A 62-year-old Japanese man underwent low anterior resection for rectal adenocarcinoma 9 years ago. Approximately 3 years later, he underwent radiofrequency ablation therapy for a metastatic liver tumor. Nine years after surgery, a tumor in liver segment III exhibiting intrabiliary extension was discovered; it was unclear if this was a metastatic liver tumor or intrahepatic cholangiocarcinoma...
2016: Journal of Rural Medicine: JRM
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