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https://www.readbyqxmd.com/read/28328605/unusual-association-cerebral-arteriovenous-malformation-and-chiari-type-i-malformation
#1
Hayri Ogul, Mecit Kantarci
Cerebral arteriovenous malformation (AVM) is a common type of cerebral vascular malformation. The imaging findings are enlarged vessels, thrombosed sinuses, and hemorrhage or gliosis on adjacent brain parenchyma. Magnetic resonance (MR) imaging can be used safely for diagnosis. Chiari type I malformation is characterized by a caudal descent of the cerebellar tonsil. Coincidence of cerebral AVM and Chiari type I malformation is very rare. In this paper, the authors report MR imaging findings of a patient with coincidence of cerebral AVM and Chiari type I malformation...
March 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28328006/clinical-experience-and-results-of-microsurgical-resection-of-arterioveonous-malformation-in-the-presence-of-space-occupying-intracerebral-hematoma
#2
Damiano G Barone, Hani J Marcus, Mathew R Guilfoyle, J Nicholas P Higgins, Nagui Antoun, Thomas Santarius, Rikin A Trivedi, Ramez W Kirollos
BACKGROUND: Management of ruptured arteriovenous malformations (AVMs) with a mass-producing intracerebral hematoma (ICH) represents a surgical dilemma. OBJECTIVE: To evaluate the clinical outcome and obliteration rates of microsurgical resection of AVM when performed concomitantly with evacuation of an associated space-occupying ICH. METHODS: Data of patients with AVM were collected prospectively. Cases were identified in which an AVM was resected and an associated space-occupying ICH was evacuated at the same time, and divided into "group 1," in which the surgery was performed acutely within 48 h of presentation (secondary to elevated intracranial pressure); and "group 2," in which selected patients were operated upon in the presence of a liquefying ICH in the "subacute" stage...
March 15, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28328005/incidence-and-management-of-late-adverse-radiation-effects-after-arteriovenous-malformation-radiosurgery
#3
Bruce E Pollock, Michael J Link, Megan E Branda, Curtis B Storlie
BACKGROUND: Late adverse radiation effects (ARE) typically occur many years after stereotactic radiosurgery (SRS) of intracranial arteriovenous malformations (AVM). They are characterized by perilesional edema or cyst formation and are distinct from radiation-induced changes (RIC) noted in the first 1 to 2 years after AVM SRS and radiation necrosis. OBJECTIVE: To determine the incidence of late ARE after AVM SRS. METHODS: Retrospective review of 233 AVM patients having SRS from 1990 to 2009...
February 23, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28327955/differences-in-functional-outcome-across-subtypes-with-spetzler-martin-grade-ii-arteriovenous-malformations
#4
Alice L Hung, Wuyang Yang, Erick M Westbroek, Tomas Garzon-Muvdi, Justin M Caplan, Maria Braileanu, Joanna Y Wang, Geoffrey P Colby, Alexander L Coon, Rafael J Tamargo, Judy Huang
BACKGROUND: The Spetzler-Martin grading system for brain arteriovenous malformations (AVMs) is based on size (S), eloquence (E), and deep venous drainage (V). However, variation exists due to subgroup heterogeneity. While previous studies have demonstrated variations in outcomes within grade III AVMs, no studies have focused on grade II AVM subtypes. OBJECTIVE: We aim to delineate how functional outcomes differ among patients with subtypes of grade II AVMs. METHODS: We retrospectively reviewed patients with AVMs evaluated at our institution from 1990 to 2013...
February 4, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28326220/extensive-renal-arteriovenous-malformations-treated-by-transcatheter-arterial-embolization
#5
Tadashi Tabei, Hironao Tajirika, Jun Yoshigi, Kazuki Kobayashi
An 84-year-old woman was referred to our department due to gross hematuria. Enhanced computed tomography revealed early enhancement of the right renal vein and multiple tortuous vessels around the right renal hilus, part of which had invaded into the renal parenchyma and renal calix. We diagnosed her with arteriovenous malformations (AVMs) and performed transcatheter arterial embolization (TAE). Angiography showed extensive and complex AVMs located in the central and peripheral areas of her kidney. After TAE, the hematuria resolved and she became hemodynamically stable...
2017: Case Reports in Urology
https://www.readbyqxmd.com/read/28324183/multimodality-management-and-outcomes-of-brain-arterio-venous-malformations-avms-in-children-personal-experience-and-review-of-the-literature-with-specific-emphasis-on-age-at-first-avm-bleed
#6
REVIEW
Anan Shtaya, John Millar, Owen Sparrow
PURPOSE: The purpose of this paper is to study the presentation and analyse the results of multimodality treatment of brain arterio-venous malformations (AVMs) in children at our centre and review age at first AVM rupture in the literature. METHODS: Of 52 patients aged <18 years, 47 with brain AVMs (27 males and 20 females) aged 4-17 years (mean 12.2) were retrospectively reviewed. PubMed search revealed five additional studies including 267 patients where the prevalence of age-related AVMs rupture was analysed...
March 21, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28323878/microsurgery-for-intracranial-arteriovenous-malformation-long-term-outcomes-in-445-patients
#7
Qingqing Ren, Min He, Yunhui Zeng, Zhiyong Liu, Hao Liu, Jianguo Xu
BACKGROUND: The management of intracranial arteriovenous malformations(AVMs) poses challenges to the cerebrovascular specialists. OBJECTIVE: To review the long-term outcomes of intracranial AVMs treated with microsurgical resections. METHODS: We performed a retrospective review of 445 patients with intracranial AVMs treated in our hospital from January 1st, 2008 to December 31st, 2014. The extracted data included demographic characteristics, clinical presentations, Spetzler-Martin (SM) grades, Supplemented Spetzler-Martin (SM-Supp) Grades, treatment modalities, long-term outcomes, and obliteration rates...
2017: PloS One
https://www.readbyqxmd.com/read/28323192/multimodality-management-of-spetzler-martin-grade-3-brain-arteriovenous-malformations-with-subgroup-analysis
#8
Isaac Josh Abecassis, John D Nerva, Abdullah Feroze, Jason Barber, Basavaraj V Ghodke, Louis J Kim, Laligam N Sekhar
INTRODUCTION: Spetzler-Martin grade 3 (SM3) lesions entail 4 distinct subtypes described based on size, eloquence, and deep venous drainage (DVD) (3A-3D). The ideal management of each is contentious, and the results of A Randomized Trial of Unruptured Brain AVMs (ARUBA) introduced additional controversy and attention towards management strategies of unruptured bAVMs. METHODS: We retrospectively reviewed 114 patients with treated SM3 bAVMs, including both ruptured and unruptured lesions...
March 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28315801/use-of-indocyanine-green-fluorescence-endoscopy-to-treat-concurrent-perimedullary-and-dural-arteriovenous-fistulas-in-the-cervical-spine
#9
Akira Ito, Toshiki Endo, Tomoo Inoue, Hidenori Endo, Kenichi Sato, Teiji Tominaga
BACKGROUND: Intraoperative microscopic fluorescence angiography using indocyanine green (ICG) provides visual information on real-time blood flow. However, this method cannot be applied for lesions that are not visible under microscopic imaging because excitation light does not reach the targeted vascular structures. Endoscope-integrated ICG video-angiography has recently been advocated to compensate for this limitation. This is the first reported case of a spinal arteriovenous malformation in which endoscope-integrated ICG video-angiography was successfully used...
March 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28299220/spontaneous-regression-of-uterine-arteriovenous-malformations-with-conservative-management
#10
Keiko Mekaru, Sugiko Oishi, Kozue Akamine, Chiaki Heshiki, Yoichi Aoki
Uterine arteriovenous malformation (AVM) can cause massive hemorrhage and is often treated with uterine artery embolization (UAE), which may lead to ovarian insufficiency. Thus, avoiding UAE should be considered, particularly in women undergoing fertility treatments. We present three women diagnosed with postmiscarriage AVM on color Doppler by transvaginal ultrasound imaging. They had no genital bleeding and a small mass, measuring 16-22 mm. If estradiol was >300 pg/mL when AVM was diagnosed, then a gonadotropin-releasing hormone agonist was administered...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28298018/brainstem-arteriovenous-malformations-lesion-characteristics-and-treatment-outcomes
#11
Venkatesh S Madhugiri, Mario K C Teo, Joli Vavao, Teresa Bell-Stephens, Gary K Steinberg
OBJECTIVE Brainstem arteriovenous malformations (AVMs) are rare lesions that are difficult to diagnose and treat. They are often more aggressive in their behavior when compared with their supratentorial counterparts. The consequence of a brainstem hemorrhage is often devastating, and many patients are in poor neurological status at presentation. The authors examine the factors associated with angiographically confirmed cure and those affecting management outcomes for these complex lesions. METHODS This was a retrospective analysis of data gathered from the prospectively maintained Stanford AVM database...
February 17, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28297343/evaluation-of-the-stability-of-the-stereotactic-leksell-frame-g-in-gamma-knife-radiosurgery
#12
Alvaro Rojas-Villabona, Katherine Miszkiel, Neil Kitchen, Rolf Jäger, Ian Paddick
The purpose of this study was to evaluate the stability of the Leksell Frame G in Gamma Knife radiosurgery (GKR). Forty patients undergoing GKR underwent pretreatment stereotactic MRI for GKR planning and stereotactic CT immediately after GKR. The stereotactic coordinates of four anatomical landmarks (cochlear apertures and the summits of the anterior post of the superior semicircular canals, bilaterally) were measured by two evaluators on two separate occasions in the pretreatment MRI and post-treatment CT scans and the absolute distance between the observations is reported...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296312/two-year-experience-with-the-commercial-gamma-knife-check-software
#13
Andy Yuanguang Xu, Jagdish Bhatnagar, Greg Bednarz, Josef Novotny, John Flickinger, L Dade Lunsford, M Saiful Huq
The Gamma Knife Check software is an FDA approved second check system for dose calculations in Gamma Knife radiosurgery. The purpose of this study was to evaluate the accuracy and the stability of the commercial software package as a tool for independent dose verification. The Gamma Knife Check software version 8.4 was commissioned for a Leksell Gamma Knife Perfexion and a 4C unit at the University of Pittsburgh Medical Center in May 2012. Independent dose verifications were performed using this software for 319 radiosurgery cases on the Perfexion and 283 radiosurgery cases on the 4C units...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28294563/a-new-material-for-tissue-engineered-vagina-reconstruction-acellular-porcine-vagina-matrix
#14
Jing-Kun Zhang, Run-Xuan Du, Lin Zhang, Ya-Nan Li, Ming-le Zhang, Shuo Zhao, Xiang-Hua Huang, Yan-Fang Xu
Acellular matrix materials have been widely used to repair various tissues and organs. According to the plastic principle, when a part of the body is lost, it should be replaced with a similar material. Therefore, the use of a homologous organ-specific acellular vaginal tissue in vagina reconstruction repair surgery may show good results. However, the acellular vagina matrix (AVM) form large vertebrates is difficult to isolate. In this study, we described a multi-step method to prepare porcine AVM and evaluated the efficacy of acellularization...
March 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28294455/integration-of-arterial-spin-labeling-into-stereotactic-radiosurgery-planning-of-cerebral-arteriovenous-malformations
#15
Onur Ozyurt, Alp Dincer, Mehmet Erdem Yildiz, Selcuk Peker, Meltem Yilmaz, Meric Sengoz, Cengizhan Ozturk
PURPOSE: To test whether the combined use of 4D arterial spin labeling angiography (4D ASL) and contrast-enhanced magnetic resonance angiography (4D CE-MRA) can work as a prospective alternative to digital subtraction angiography (DSA) for the delineation of the arteriovenous malformation (AVM) nidus in stereotactic radiosurgery (SRS) planning. MATERIALS AND METHODS: A custom 4D ASL sequence and a proof-of-concept software tool to integrate 4D ASL data to SRS planning were implemented...
March 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28291219/-surgical-treatment-of-a-pregnant-female-with-avm-hemorrhage
#16
A S Kheireddin, A Yu Lubnin, A N Kaftanov, K N Akhvlediani, O B Belousova, A V Dmitriev, O B Kuchina
Hemorrhages from arteriovenous malformations (AVMs) in pregnant females are rare, but they are known to lead to high maternal and infant mortality. There are no standards for AVM treatment in pregnant females. Many authors believe that AVM resection before delivery improves the prognosis for life and health of the mother and fetus. In this paper, we present a case of successful surgical treatment of a female patient with AVM hemorrhage at 20 weeks and address management issues of these patients.
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28289766/-complications-and-monitoring-standards-after-elective-craniotomy-in-germany
#17
C Henker, C Schmelter, J Piek
BACKGROUND: The increasing endeavors to make inpatient treatment processes more effective leads to a reduction of the length of stay in hospital and minimization of postoperative monitoring. Therefore, the aim of our study was to determine potential postoperative complications for neurosurgical patients undergoing elective surgery with respect to assessment of the relevance for intensive medical care. Furthermore, our approach was compared with the standard of postoperative care of such patients in Germany...
March 13, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28289757/optimization-of-the-surgical-approach-in-avms-using-mri-and-4d-dsa-fusion-technique-a%C3%A2-technical-note
#18
S Tritt, B Ommer, S Gehrisch, S Klein, V Seifert, J Berkefeld, J Konczalla
PURPOSE: Previously published data demonstrated the possibility of displaying the angioarchitecture of intracranial vascular malformations using time-resolved 3D imaging (4D digital subtraction angiography [DSA]). The purpose of our study was to prove the technical feasibility of creating fused images of time-resolved 3D reconstructions and MPRAGE MRI data sets and to check the reliability of the correct anatomical display of the angioma nidus and the venous drainage in the fused images of patients with intracranial arteriovenous malformations (AVM)...
March 13, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28289622/massive-nasal-arterio-venous-malformation-avm-excision-and-reconstruction-with-expanded-forehead-flap-a-case-report
#19
Ghasem Ali Khorasani, Siamak Rakei, Hooman Riazi
Nasal arterio-venous malformations (AVM) are uncommon lesions. We present a rare case of huge, long standing AVM in the nasal area which was treated by angioembolization, followed by surgical excision and forehead flap reconstruction.
January 2017: World Journal of Plastic Surgery
https://www.readbyqxmd.com/read/28283870/-dirty-coagulation-technique-as-an-alternative-to-microclips-for-control-of-bleeding-from-deep-feeders-during-brain-arteriovenous-malformation-surgery
#20
Danil A Kozyrev, Peeraphong Thiarawat, Behnam Rezai Jahromi, Patcharin Intarakhao, Joham Choque-Velasquez, Ferzat Hijazy, Mario K Teo, Juha Hernesniemi
BACKGROUND: Meticulous haemostasis is one of the most important factors during microneurosurgical resection of brain arteriovenous malformation (AVM). Controlling major arterial feeders and draining veins with clips and bipolar coagulation are well-established techniques, while managing with bleeding from deep tiny vessels still proves to be challenging. This technical note describes a technique used by the senior author in AVM surgery for last 20 years in dealing with the issue highlighted...
March 11, 2017: Acta Neurochirurgica
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