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https://www.readbyqxmd.com/read/27913800/the-transvenous-pressure-cooker-technique-a-treatment-for-brain-arteriovenous-malformations
#1
Guang Zhang, Shiyi Zhu, Pei Wu, Shancai Xu, Huaizhang Shi
The treatment of brain arteriovenous malformations (AVMs) remains a significant challenge, especially hemorrhagic AVMs which are unsuitable for microsurgery or radiosurgery. We demonstrate an AVM located in the left basal ganglia area, supplied by slender arteries, and treated by the transvenous pressure cooker technique. Herein, we describe the procedure and outline the crucial points and indications for this technique.
December 2, 2016: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27911249/international-multicenter-cohort-study-of-pediatric-brain-arteriovenous-malformations-part-2-outcomes-after-stereotactic-radiosurgery
#2
Robert M Starke, Dale Ding, Hideyuki Kano, David Mathieu, Paul P Huang, Caleb Feliciano, Rafael Rodriguez-Mercado, Luis Almodovar, Inga S Grills, Danilo Silva, Mahmoud Abbassy, Symeon Missios, Douglas Kondziolka, Gene H Barnett, L Dade Lunsford, Jason P Sheehan
OBJECTIVE Pediatric patients (age < 18 years) harboring brain arteriovenous malformations (AVMs) are burdened with a considerably higher cumulative lifetime risk of hemorrhage than adults. Additionally, the pediatric population was excluded from recent prospective comparisons of intervention versus conservative management for unruptured AVMs. The aims of this multicenter, retrospective cohort study are to analyze the outcomes after stereotactic radiosurgery for unruptured and ruptured pediatric AVMs. METHODS We analyzed and pooled AVM radiosurgery data from 7 participating in the International Gamma Knife Research Foundation...
December 2, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27911248/international-multicenter-cohort-study-of-pediatric-brain-arteriovenous-malformations-part-1-predictors-of-hemorrhagic-presentation
#3
Dale Ding, Robert M Starke, Hideyuki Kano, David Mathieu, Paul P Huang, Caleb Feliciano, Rafael Rodriguez-Mercado, Luis Almodovar, Inga S Grills, Danilo Silva, Mahmoud Abbassy, Symeon Missios, Douglas Kondziolka, Gene H Barnett, L Dade Lunsford, Jason P Sheehan
OBJECTIVE Brain arteriovenous malformations (AVMs) are the most common cause of spontaneous intracranial hemorrhage in pediatric patients (age < 18 years). Since the cumulative lifetime risk of AVM hemorrhage is considerable in children, an improved understanding of the risk factors influencing hemorrhagic presentation may aid in the management of pediatric AVMs. The aims of this first of a 2-part multicenter, retrospective cohort study are to evaluate the incidence and determine the predictors of hemorrhagic presentation in pediatric AVM patients...
December 2, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27911246/role-of-follow-up-imaging-after-resection-of-brain-arteriovenous-malformations-in-pediatric-patients-a-systematic-review-of-the-literature
#4
Joaquin E Jimenez, Zachary C Gersey, Jason Wagner, Brian Snelling, Sudheer Ambekar, Eric C Peterson
OBJECTIVE Pediatric patients are at risk for the recurrence of brain arteriovenous malformation (AVM) after resection. While there is general consensus on the importance of follow-up after surgical removal of an AVM, there is a lack of consistency in the duration of that follow-up. The object of this systematic review was to examine the role of follow-up imaging in detecting AVM recurrence early and preventing AVM rupture. METHODS This systematic review was performed using articles obtained through a search of the literature contained in the MeSH database, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines...
December 2, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27903925/onyx-extravasation-during-embolization-of-a-brain-arteriovenous-malformation
#5
Hiroyuki Ikeda, Hirotoshi Imamura, Yuji Agawa, Yukihiro Imai, Shoichi Tani, Hidemitsu Adachi, Tatsuya Ishikawa, Yohei Mineharu, Nobuyuki Sakai
During Onyx embolization to treat brain arteriovenous malformation (AVM), carefully observing the penetration of Onyx to the nidus is important in order to avoid complications such as hemorrhage, ischemia, and difficulty with microcatheter removal. We encountered a case of Onyx extravasation during embolization of a cerebellar AVM confirmed by surgical resection and pathological analysis. The patient was a 44-year-old man with Spetzler-Martin grade I cerebellar AVM who underwent Onyx embolization prior to resection of the brain AVM...
November 30, 2016: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27903195/dosimetric-effects-of-onyx-embolization-on-gamma-knife-arteriovenous-malformation-dose-distributions
#6
David J Schlesinger, Håkan Nordström, Anders Lundin, Zhiyuan Xu, Jason P Sheehan
OBJECTIVE Patients with arteriovenous malformations (AVMs) treated with Gamma Knife radiosurgery (GKRS) subsequent to embolization suffer from elevated local failure rates and differences in adverse radiation effects. Onyx is a common embolic material for AVMs. Onyx is formulated with tantalum, a high atomic number (Z = 73) element that has been investigated as a source of dosimetric uncertainty contributing to the less favorable clinical results. However, prior studies have not modeled the complicated anatomical and beam geometries characteristic of GKRS...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27903193/three-dimensional-assessment-of-the-effects-of-high-density-embolization-material-on-the-absorbed-dose-in-the-target-for-gamma-knife-radiosurgery-of-arteriovenous-malformations
#7
Yoichi Watanabe, Divyajot Sandhu, Leighton Warmington, Sean Moen, Ramachandra Tummala
OBJECTIVE Arteriovenous malformation (AVM) is an intracranial vascular disorder. Gamma Knife radiosurgery (GKRS) is used in conjunction with intraarterial embolization to eradicate the nidus of AVMs. Clinical results indicate that patients with prior embolization tend to gain less benefit from GKRS. The authors hypothesized that this was partly caused by dosimetric deficiency. The actual dose delivered to the target may be smaller than the intended dose because of increased photon attenuation by high-density embolic materials...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27903180/results-of-volume-staged-fractionated-gamma-knife-radiosurgery-for-large-complex-arteriovenous-malformations-obliteration-rates-and-clinical-outcomes-of-an-evolving-treatment-paradigm
#8
Alberto Franzin, Pietro Panni, Giorgio Spatola, Antonella Del Vecchio, Alberto L Gallotti, Carmen R Gigliotti, Andrea Cavalli, Carmine A Donofrio, Pietro Mortini
OBJECTIVE There are few reported series regarding volume-staged Gamma Knife radiosurgery (GKRS) for the treatment of large, complex, cerebral arteriovenous malformations (AVMs). The object of this study was to report the results of using volume-staged Gamma Knife radiosurgery for patients affected by large and complex AVMs. METHODS Data from 20 patients with large AVMs were prospectively included in the authors' AVM database between 2004 and 2012. A staging strategy was used when treating lesion volumes larger than 10 cm(3)...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27900505/subsequent-haemorrhage-in-children-with-untreated-brain-arteriovenous-malformation-higher-risk-with-unbalanced-inflow-and-outflow-angioarchitecture
#9
Li Ma, Xiao-Lin Chen, Yu Chen, Chun-Xue Wu, Jun Ma, Yuan-Li Zhao
OBJECTIVES: Children with brain arteriovenous malformations (bAVMs) are at risk of life-threatening haemorrhage in their early lives. Our aim was to analyse various angioarchitectural features of bAVM to predict the risk of subsequent haemorrhage during follow-up in children. METHODS: We identified all consecutive children admitted to our institution for bAVMs between July 2009 and September 2015. Children with at least 1 month of treatment-free follow-up after diagnosis were included in further analysis...
November 29, 2016: European Radiology
https://www.readbyqxmd.com/read/27899758/estimating-the-risks-of-adverse-radiation-effects-after-gamma-knife-radiosurgery-for-arteriovenous-malformations
#10
Hideyuki Kano, John C Flickinger, Daniel Tonetti, Alan Hsu, Huai-Che Yang, Thomas J Flannery, Ajay Niranjan, L Dade Lunsford
BACKGROUND AND PURPOSE: We evaluated risk factors associated with the development of adverse radiation effects (ARE) after stereotactic radiosurgery (SRS) for cerebral arteriovenous malformations (AVMs). METHODS: We evaluated 755 patients with AVM who underwent a single Gamma Knife SRS procedure with at least a 2-year minimum follow-up. Eighty-seven patients (12%) underwent previous resection and 128 (17%) had previous embolization. The median target volume was 3...
November 29, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27897192/pi3-kinase-inhibition-improves-vascular-malformations-in-mouse-models-of-hereditary-haemorrhagic-telangiectasia
#11
Roxana Ola, Alexandre Dubrac, Jinah Han, Feng Zhang, Jennifer S Fang, Bruno Larrivée, Monica Lee, Ana A Urarte, Jan R Kraehling, Gael Genet, Karen K Hirschi, William C Sessa, Francesc V Canals, Mariona Graupera, Minhong Yan, Lawrence H Young, Paul S Oh, Anne Eichmann
Activin receptor-like kinase 1 (ALK1) is an endothelial serine-threonine kinase receptor for bone morphogenetic proteins (BMPs) 9 and 10. Inactivating mutations in the ALK1 gene cause hereditary haemorrhagic telangiectasia type 2 (HHT2), a disabling disease characterized by excessive angiogenesis with arteriovenous malformations (AVMs). Here we show that inducible, endothelial-specific homozygous Alk1 inactivation and BMP9/10 ligand blockade both lead to AVM formation in postnatal retinal vessels and internal organs including the gastrointestinal (GI) tract in mice...
November 29, 2016: Nature Communications
https://www.readbyqxmd.com/read/27896262/uterine-arteriovenous-malformation-with-positive-serum-beta-human-chorionic-gonadotropin-embolization-of-both-uterine-arteries-and-extra-uterine-feeding-arteries
#12
Su Mi Kim, Hee Young Ahn, Min Jeong Choi, Yun Dan Kang, Jin Wan Park, Choong Hak Park, Jong Soo Kim
The incidence of uterine arteriovenous malformation (AVM) is rare. However, it is clinically significant in that it can cause life-threatening vaginal bleeding. We report a case of a large uterine AVM with positive serum beta-human chorionic gonadotropin. A presumptive diagnosis was made; a uterine AVM accompanied by, early pregnancy or retained product of conception. Because this uterine AVM was extensive, transcatheter arterial embolization of both uterine arteries and extra-uterine feeding arteries was performed...
November 2016: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/27890761/the-coexistence-of-extradural-arteriovenous-fistula-and-soft-tissue-arteriovenous-malformation-within-the-same-metamere
#13
Nobuhiko Arai, Takenori Akiyama, Kazunari Yoshida
BACKGROUND: -Spinal arteriovenous shunts are a common spinal vascular disorder. However, they can have a misleading clinical presentation and poor prognosis. They are classified into 4 types according to shunt points and drainage route, among which extradural arteriovenous fistula (eAVF) is the most rare, comprising only 1% of all spinal arteriovenous shunts. Here, we report an extremely rare case of coexistent eAVF at the craniocervical junction and soft tissue arteriovenous malformation (AVM) within the same metamere...
November 24, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27878793/novel-cases-of-amyotrophic-lateral-sclerosis-after-treatment-of-cerebral-arteriovenous-malformationss
#14
Michael Linnebank, Cameron G McDougall, Stefanie Krueger, Saskia Biskup, Manuela Neumann, Michael Weller, Antonios Valavanis, Johannes Prudlo
Previous case studies reported nine patients with cerebral arteriovenous malformations (AVM) who developed amyotrophic lateral sclerosis (ALS) after AVM embolisation. Here, we describe three novel cases of ALS which developed 13-34 years after treatment, including embolisation, of cerebral AVM. This study provides further arguments supporting the thesis that embolisation of cerebral AVM might influence the risk of later ALS development.
2016: Swiss Medical Weekly
https://www.readbyqxmd.com/read/27878447/morbidity-and-healthcare-costs-of-vascular-anomalies-a-national-study
#15
Jina Kim, Zhifei Sun, Harold J Leraas, Uttara P Nag, Ehsan Benrashid, Alexander C Allori, Waleska M Pabon-Ramos, Henry E Rice, Cynthia K Shortell, Elisabeth T Tracy
PURPOSE: This study aimed to define morbidities and costs related to modern-day medical care for children with vascular anomalies. METHODS: We reviewed the 2003-2009 Kids' Inpatient Database for pediatric patients (age < 21 years) hospitalized with hemangioma, arteriovenous malformation (AVM), or lymphatic malformation (LM). Patient characteristics, hospital complications, and hospital charges were compared by vascular anomaly type. Multivariable linear regression modeling was used to determine predictors of increasing hospital costs for patients with AVMs...
November 22, 2016: Pediatric Surgery International
https://www.readbyqxmd.com/read/27869147/interplay-between-vegf-and-nrf2-regulates-angiogenesis-due-to-intracranial-venous-hypertension
#16
Liwen Li, Hao Pan, Handong Wang, Xiang Li, Xiaomin Bu, Qiang Wang, Yongyue Gao, Guodao Wen, Yali Zhou, Zixiang Cong, Youqing Yang, Chao Tang, Zhengwei Liu
Venous hypertension(VH) plays an important role in the pathogenesis of cerebral arteriovenous malformations (AVMs) and is closely associated with the HIF-1α/VEGF signaling pathway. Nuclear factor erythroid 2-related factor 2(Nrf2) significantly influences angiogenesis; however, the interplay between Nrf2 and VEGF under VH in brain AVMs remains unclear. Therefore, our study aimed to investigate the interplay between Nrf2 and VEGF due to VH in brain AVMs. Immunohistochemistry indicated that Nrf2 and VEGF were highly expressed in human brain AVM tissues...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866455/changes-in-pulsatility-and-resistance-indices-of-cerebral-arteriovenous-malformation-feeder-arteries-after-embolization-and-surgery
#17
Sophia F Shakur, Sepideh Amin-Hanjani, Mohamed Abouelleil, Victor A Aletich, Fady T Charbel, Ali Alaraj
OBJECTIVES: Embolization reduces flow in cerebral arteriovenous malformations (AVMs) before surgical resection, but changes in pulsatility and resistance indices (PI, RI) are unknown. Here, we measure PI, RI in AVM arterial feeders before and after embolization/surgery. METHODS: Records of patients who underwent AVM embolization and surgical resection at our institution between 2007 and 2014 and had PI, RI, and flows obtained using quantitative magnetic resonance angiography were retrospectively reviewed...
November 21, 2016: Neurological Research
https://www.readbyqxmd.com/read/27865576/embolization-of-congenital-renal-arteriovenous-malformations-using-ethanol-and-coil-depending-on-angiographic-types
#18
Jin Ho Hwang, Young Soo Do, Kwang Bo Park, Hwan Hoon Chung, Hong Suk Park, Dongho Hyun
PURPOSE: To evaluate effectiveness and safety of embolization of congenital renal arteriovenous malformations (AVMs) using ethanol and/or coil according to angiographic type. MATERIALS AND METHODS: Between August 2010 and October 2015, 11 patients (13 sessions; 10 women and 1 man; mean age, 50.8 y) with congenital renal AVMs were treated using ethanol and/or coils via 2 approaches (transarterial access or direct puncture). Demographics, clinical findings, diagnostic modalities, angiographic types, technical and clinical success rates, and complications were reviewed...
November 16, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27864942/a-review-of-capture-and-post-release-mortality-of-elasmobranchs
#19
REVIEW
J R Ellis, S R McCully Phillips, F Poisson
There is a need to better understand the survivorship of discarded fishes, both for commercial stocks and species of conservation concern. Within European waters, the landing obligations that are currently being phased in as part of the European Union's reformed common fisheries policy means that an increasing number of fish stocks, with certain exceptions, should not be discarded unless it can be demonstrated that there is a high probability of survival. This study reviews the various approaches that have been used to examine the discard survival of elasmobranchs, both in terms of at-vessel mortality (AVM) and post-release mortality (PRM), with relevant findings summarized for both the main types of fishing gear used and by taxonomic group...
November 18, 2016: Journal of Fish Biology
https://www.readbyqxmd.com/read/27864873/hereditary-haemorrhagic-telangiectasia-to-transplant-or-not-to-transplant-is-there-a-right-time-for-liver-transplantation
#20
Yannick D Muller, Roland Oppliger, Romain Breguet, Philippe Meyer, Laura Rubbia-Brandt, Pierre-Auguste Petignat, Thomas Harr, Eric Dayer, Jörg D Seebach
BACKGROUND & AIMS: Hereditary haemorrhagic telangiectasia is characterized by arterio-venous malformations (AVM). It frequently involves the liver without clinical symptoms, but may lead to biliary ischaemia, portal hypertension, or fatal high-output heart failure. The indication of liver transplantation is controversial. METHODS: Herein, we report the case of a 65-year-old female patient with a 'double Osler syndrome' consisting of hereditary haemorrhagic telangiectasia (HHT) and type I hereditary angioedema diagnosed at the age of 25 and 22 years respectively...
December 2016: Liver International: Official Journal of the International Association for the Study of the Liver
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