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https://www.readbyqxmd.com/read/29915886/radiofrequency-ablation-in-gross-total-excision-of-cervical-chordoma-ideas-and-technique
#1
Hua Zhou, Xiaoxiong Yang, Liang Jiang, Feng Wei, Xiaoguang Liu, Zhongjun Liu
PURPOSE: To use radiofrequency ablation (RFA) in the resection of C4 cervical chordoma with a giant paravertebral tumor mass to achieve tumor-free exposed margins and perform a gross total excision. METHODS: A gross total excision using combined posterior and anterior approaches was performed. In the posterior stage, the C4 posterior arch was removed and the C4/C5 nerve roots and vertebral artery were released from the tumor. In the anterior stage, the giant soft mass of tumor from C3 to C6 was treated with RFA to make it shrink and solidify visually to achieve tumor-free exposed margins before resecting the tumor...
June 18, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29913844/systematic-review-of-neuropathic-component-in-persistent-post-surgical-pain
#2
S Haroutiunian, L Nikolajsen, N B Finnerup, T S Jensen
Background/aim The aim of the current study was to assess the neuropathic component of persistent post-surgical pain (PPSP) following eleven types of surgery. Methods We performed a systematic PubMed, CENTRAL and EMBASE search to identify studies on PPSP following (i) thoracic surgery, (ii) breast surgery, (iii) groin hernia repair, (iv) prostatectomy, (v) major abdominal surgery, (vi) gynecologic surgery, (vii) iliac crest bone harvest, (viii) total hip arthroplasty (THA) or knee arthroplasty (TKA), (ix) varicose vein stripping or ablation, (x) mandibular sagittal split osteotomy and (xi) donor nephrectomy, and assessed the prevalence of Probable/Definite neuropathic pain using the recently published neuropathic pain probability grading criteria [1]...
December 29, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29913031/four-year-survival-of-a-patient-with-spinal-metastatic-acinic-cell-carcinoma-after-a-total-en-bloc-spondylectomy-and-reconstruction-with-a-frozen-tumor-bearing-bone-graft
#3
Apiruk Sangsin, Hideki Murakami, Takaki Shimizu, Satoshi Kato, Hiroyuki Tsuchiya
Acinic cell carcinoma metastasizing to the spine is extremely rare. The authors present a case of acinic cell carcinoma of the parotid gland with subsequent lung and spinal metastases, treated with en bloc spondylectomy. A 41-year-old man presented with a left parotid mass. After being diagnosed with acinic cell carcinoma, he underwent a total parotidectomy. Imaging studies revealed a metastatic osteoblastic lesion in the T4 vertebral body and multiple lung metastases. Total en bloc spondylectomy and reconstruction with a frozen tumor-bearing bone graft were performed to treat the T4 metastasis...
June 18, 2018: Orthopedics
https://www.readbyqxmd.com/read/29902558/programmatic-comparison-and-dissemination-of-an-audit-of-single-fraction-radiotherapy-prescribing-practices-for-bone-metastases-is-associated-with-a-meaningful-and-lasting-change-in-practice-on-a-population-level
#4
Robert Olson, Matthew Chan, Neelam Minhas, Gurkirat Kandola, Manpreet Tiwana, Shilo Lefresne, Ross Halperin, Devin Schellenberg, Elaine Wai, Nissar Ahmed, Scott Tyldesley
PURPOSE: There is ample evidence that single fraction radiation therapy (SFRT) is equally efficacious as more costly and morbid multi-fraction regimens. We previously demonstrated that an audit-based intervention increased the use of SFRT in all regional cancer centers the year following. However, other investigators have demonstrated interventions were only associated with a transient one-year change in prescribing practices. We sought to determine if our intervention resulted in a more lasting impact...
June 11, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29901478/coronal-fracture-of-the-lunate-in-advanced-kienb%C3%A3-ck-disease-reestablishing-midcarpal-congruency-to-enable-osteochondral-reconstruction-a-case-report
#5
Joshua A Gillis, James P Higgins
CASE: We describe a patient with Bain grade-2b Kienböck disease with a coronal fracture of the distal lunate articular surface with proximal structure collapse. To reestablish midcarpal congruity, we used a bone-anchored suture to repair the coronal split in the lunate in preparation for lunate preservation with osteochondral medial femoral trochlea (MFT) reconstruction. CONCLUSION: In Bain grade-2b Kienböck disease, lunate reconstruction of both the proximal and distal joint surfaces can be performed...
June 13, 2018: JBJS Case Connector
https://www.readbyqxmd.com/read/29897047/the-effects-of-image-homogenisation-on-simulated-transcranial-ultrasound-propagation
#6
James L B Robertson, Jillian Urban, Joel Stitzel, Bradley E Treeby
Transcranial transmission of ultrasound is increasingly used in a variety of clinical and research applications, including high intensity ablation, opening the blood brain barrier, and neural stimulation. Numerical simulations of ultrasound propagation in the head are used to enable effective transcranial focusing and predict intracranial fields. Such simulations require maps of the acoustic properties of the head, which can be derived from clinical CT images. However, the spatial resolution of these images is typically coarser than the scale of heterogeneities within the skull bone, which are known to exert a major influence on ultrasound propagation...
June 13, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29893070/perspective-review-on-applications-of-optics-in-spinal-surgery
#7
Daipayan Guha, Victor X D Yang
Optical technologies may be applied to multiple facets of spinal surgery from diagnostics to intraoperative image guidance to therapeutics. In diagnostics, the current standard remains cross-sectional static imaging. Optical surface scanning tools may have an important role; however, significant work is required to clearly correlate surface metrics to radiographic and clinically relevant spinal anatomy and alignment. In the realm of intraoperative image guidance, optical tracking is widely developed as the current standard of instrument tracking, however remains compromised by line-of-sight issues and more globally cumbersome registration workflows...
June 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29892521/analysis-of-curative-effect-of-i-125-implantation-combined-with-radiofrequency-ablation-in-treating-bone-metastases
#8
Qizhou Zhang, Kunyao Zhang, Bing Xie, Yimin Ren, Guoliang Li, Liping Zhang, Aijing Wang, Yang Li
The aims of this study were to investigate the clinical effects of I125 implantation combined with radiofrequency ablation in treating bone metastases (BM) and analyze its clinical application so as to provide better treatment protocols for the treatment of BM. A total of 63 BM patients were randomly divided into the I125 implantation group (CON, treated with I125 seeds alone, 33 patients) and the combination group (I125 -MA, 30 patients) to compare the clinical efficacy and adverse effects. After treatment, the clinical efficacy of Group I125 -MA was significantly better than Group CON, and the quality of life was improved significantly (P< 0...
June 2018: Journal of Bone Oncology
https://www.readbyqxmd.com/read/29891204/stereotactic-ablative-radiation-therapy-induces-systemic-differences-in-peripheral-blood-immunophenotype-dependent-on-irradiated-site
#9
Heather M McGee, Megan E Daly, Sohelia Azghadi, Susan L Stewart, Leslie Oesterich, Jeffrey Schlom, Renee Donahue, Jonathan D Schoenfeld, Qian Chen, Shyam Rao, Ruben C Fragoso, Richard K Valicenti, Robert J Canter, Emmanual M Maverakis, William J Murphy, Karen Kelly, Arta M Monjazeb
PURPOSE: Despite the strong interest in combining stereotactic ablative radiation therapy (SAR) with immunotherapy, limited data characterizing the systemic immune response after SAR are available. We hypothesized that the systemic immune response to SAR would differ by irradiated site owing to inherent differences in the microenvironment of various organs. METHODS AND MATERIALS: Patients receiving SAR to any organ underwent prospective blood banking before and 1 to 2 weeks after SAR...
April 22, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29884965/bioimaging-metallomics
#10
Valderi Luiz Dressler, Edson Irineu Müller, Dirce Pozebon
This chapter focuses on bioimaging in metallomics, which involves metal and metalloids distribution in animal tissues. It starts with laser ablation-inductively coupled plasma-mass spectrometry followed by secondary ion mass spectrometry, synchrotron-based X-ray fluorescence, and electron microscopy, including transmission electron microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The basic principles of these techniques and their application for qualitative and quantitative imaging of elements are presented...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29884312/survival-of-dental-implants-placed-in-vascularised-fibula-free-flaps-after-jaw-reconstruction
#11
Sameh Attia, Joerg Wiltfang, Jörn Pons-Kühnemann, Jan-Falco Wilbrand, Philipp Streckbein, Christopher Kähling, Hans-Peter Howaldt, Heidrun Schaaf
PURPOSE: Ablative oncological surgery to treat head-and-neck cancer often triggers a requirement for jaw reconstruction. Modern surgical procedures using free microvascular flaps afford acceptable outcomes in terms of restoration of bony and soft tissue defects. A fibula free flap is often the preferred flap, as the bone length is considerable and a two-surgeon approach is possible. Dental implants play important roles in functional rehabilitation. Our aim was to evaluate the survival of dental implants placed in reconstructed areas after transfer of fibula tissue to the jaw...
June 5, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29871951/cell-intrinsic-regulation-of-murine-epidermal-langerhans-cells-by-protein-s
#12
Yaara Tabib, Nora S Jaber, Maria Nassar, Tal Capucha, Gabriel Mizraji, Tsipora Nir, Noam Koren, Itay Aizenbud, Avraham Maimon, Luba Eli-Berchoer, Asaf Wilensky, Tal Burstyn-Cohen, Avi-Hai Hovav
AXL, a member of the TYRO3, AXL, and MERTK (TAM) receptor tyrosine kinase family, has been shown to play a role in the differentiation and activation of epidermal Langerhans cells (LCs). Here, we demonstrate that growth arrest-specific 6 (GAS6) protein, the predominant ligand of AXL, has no impact on LC differentiation and homeostasis. We thus examined the role of protein S (PROS1), the other TAM ligand acting primarily via TYRO3 and MERTK, in LC function. Genetic ablation of PROS1 in keratinocytes resulted in a typical postnatal differentiation of LCs; however, a significant reduction in LC frequencies was observed in adult mice due to increased apoptosis...
June 5, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29858536/evaluation-of-the-dosimetry-approaches-in-ablation-treatment-of-thyroid-cancer
#13
Nalan Alan Selcuk, Turkay Toklu, Seval Beykan, Serife Ipek Karaaslan
In this study, we aimed to evaluate dosimetric approaches in ablation treatment of Differentiated Thyroid Carcinoma (DTC) without interrupting the clinical routine. Prior to therapy, 10.7 MBq 131 I in average was orally given to 24 patients suffering from DTC. MIRD formalism was used for dosimetric calculations. For blood and bone marrow dosimetry, blood samples and whole-body counts were collected at 2, 24, 72, and 120 h after I-131 administration. For remnant tissue dosimetry, uptake measurements were performed at the same time intervals...
June 1, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29845754/ultrafast-dynamics-of-hard-tissue-ablation-using-fs-lasers
#14
Matthias Domke, Sebastian Wick, Maike Laible, Stephan Rapp, Heinz P Huber, Ronald Sroka
Several studies on hard tissue laser ablation demonstrated that ultrafast lasers enable precise material removal without thermal side effects. Although the principle ablation mechanisms have been thoroughly investigated, there are still open questions regarding the influence of material properties on transient dynamics. In this investigation, we applied pump-probe microscopy to record ablation dynamics of biomaterials with different tensile strengths (dentin, chicken bone, gallstone, kidney stones) at delay times between 1 ps and 10 μs...
May 29, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29844930/macrophage-inducible-nitric-oxide-synthase-circulates-inflammation-and-promotes-lung-carcinogenesis
#15
Xin Wang, Zane Gray, Jami Willette-Brown, Feng Zhu, Gongping Shi, Qun Jiang, Na-Young Song, Liang Dong, Yinling Hu
Human lung squamous cell carcinoma (SCC) is highly associated with increased pulmonary macrophage infiltration. Previously, we showed that marked pulmonary infiltrating macrophages were required for spontaneous lung SCC development in a mouse model ( L-Ikkα KA/KA , KA/KA ) that resembles human lung SCC. Interestingly the lung SCC-associated macrophages specifically express elevated inducible nitric oxide synthase (NOS2). However, the role of macrophage NOS2 in lung carcinogenesis has not been explored. Here, we show that NOS2 ablation inhibits macrophage infiltration, fibrosis, and SCC development in the lungs of KA/KA mice...
2018: Cell Death Discovery
https://www.readbyqxmd.com/read/29806726/sexual-dimorphism-of-estrogen-sensitized-synoviocytes-contributes-to-gender-difference-in-temporomandibular-joint-osteoarthritis
#16
Xin-Tong Xue, Ting Zhang, Sheng-Jie Cui, Dan-Qing He, Xue-Dong Wang, Rui-Li Yang, Da-Wei Liu, Yan Liu, Ye-Hua Gan, Xiao-Xing Kou, Yan-Heng Zhou
OBJECTIVES: Temporomandibular joint osteoarthritis (TMJOA) is approximately twice as prevalent in women than in men. Synoviocytes are believed to play a critical role in joint inflammation. However, it is unknown whether synoviocytes from different genders possess sexual dimorphisms that contribute to female-predominant TMJOA. MATERIALS AND METHODS: Freund's complete adjuvant combined with monosodium iodoacetate was used to induce TMJOA in female and male rats. Histologic and radiographic features were used to evaluate TMJOA...
May 28, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29806314/-application-of-orthofix-unilateral-external-fixator-in-the-treatment-of-musculoskeletal-tumors
#17
Tao Ji, Wei Guo, Rongli Yang, Xiaodong Tang, Dasen Li, Yi Yang
Objective: To investigate the surgical characteristics and preliminary effectiveness of Orthofix unilateral external fixator in the treatment of musculoskeletal tumors. Methods: Twenty-two patients received Orthofix unilateral external fixator treatment for bone defect after tumor excision or complications after limb salvage surgery between June 2011 and March 2016. There were 11 males and 11 females with a median age of 23.5 years (range, 4-57 years). The bone defect or limb length discrepancy after tumor resection was at proximal femur in 6 cases, distal femur in 8 cases, diaphysis of femur in 3 cases, proximal tibia in 2 cases, and diaphysis of tibia in 3 cases...
October 1, 2017: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29804890/an-erk-dependent-feedback-mechanism-prevents-hematopoietic-stem-cell-exhaustion
#18
Christian Baumgartner, Stefanie Toifl, Matthias Farlik, Florian Halbritter, Ruth Scheicher, Irmgard Fischer, Veronika Sexl, Christoph Bock, Manuela Baccarini
Hematopoietic stem cells (HSCs) sustain hematopoiesis throughout life. HSCs exit dormancy to restore hemostasis in response to stressful events, such as acute blood loss, and must return to a quiescent state to prevent their exhaustion and resulting bone marrow failure. HSC activation is driven in part through the phosphatidylinositol 3-kinase (PI3K)/AKT/mTORC1 signaling pathway, but less is known about the cell-intrinsic pathways that control HSC dormancy. Here, we delineate an ERK-dependent, rate-limiting feedback mechanism that controls HSC fitness and their re-entry into quiescence...
May 17, 2018: Cell Stem Cell
https://www.readbyqxmd.com/read/29798577/-application-of-plasma-mediated-bipolar-radiofrequency-ablation-debridement-in-treatment-with-retention-of-internal-fixation-for-early-postoperative-infection-of-fractures-of-extremities
#19
Yao Lu, Rungong Yang, Jialiang Zhu, Lin Yang, Yuzhe Bai, Rigeleng Se, Yaoqi Ying
Objective: To explore the effectiveness of plasma-mediated bipolar radiofrequency ablation debridement (Coblation debridement) in treatment with retention of internal fixation for early postoperative infection of fractures of extremities. Methods: Between January 2012 and May 2015, 16 patients (12 males and 4 females) with early postoperative infection of internal fixation for extremity fracture were treated, with an average age of 41.6 years (range, 19-61 years)...
November 1, 2017: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29794372/effect-of-radioactive-iodine-induced-hypothyroidism-on-longitudinal-bone-growth-during-puberty-in-immature-female-rats
#20
Hyeonhae Choi, Ki-Young Ryu, Jaesook Roh, Jaeman Bae
Thyroid cancer in children, the most common endocrine malignancy, shows aggressive behavior and has a high recurrence rate after surgical ablation. Radioactive iodine (RAI) treatment is the most effective primary modality for medical ablation of juvenile thyroid cancer, and leads to intentional hypothyroidism. Although several negative impacts of hypothyroidism have been reported in children in response to other antithyroid agents, the combined effects of RAI exposure and hypothyroidism, on growing bones specifically, are unknown...
May 22, 2018: Experimental Animals
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