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https://www.readbyqxmd.com/read/27911229/c-2-arteriovenous-fistula-presenting-as-a-pathologic-hangman-s-fracture-case-report
#1
Rajeev D Sen, Carolina Gesteira Benjamin, Howard A Riina, Donato Pacione
The authors report on an 81-year-old woman with a pathologic hangman's fracture secondary to a complex arteriovenous fistula (AVF). The patient presented with severe, unremitting neck pain and was found to have fractures bilaterally through the pars interarticularis of C-2 with significant anterior subluxation of C-2 over C-3 along with widening of the left transverse foramen. Due to an abnormally appearing left vertebral artery (VA) on CT angiography, the patient underwent conventional angiography, which revealed a complex AVF stemming from the left VA at the level of C-2 with dilated posterior cervical veins and a large venous varix...
December 2, 2016: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27903925/onyx-extravasation-during-embolization-of-a-brain-arteriovenous-malformation
#2
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/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
#3
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/27903178/worldwide-variance-in-the-potential-utilization-of-gamma-knife-radiosurgery
#4
Travis Hamilton, L Dade Lunsford
OBJECTIVE The role of Gamma Knife radiosurgery (GKRS) has expanded worldwide during the past 3 decades. The authors sought to evaluate whether experienced users vary in their estimate of its potential use. METHODS Sixty-six current Gamma Knife users from 24 countries responded to an electronic survey. They estimated the potential role of GKRS for benign and malignant tumors, vascular malformations, and functional disorders. These estimates were compared with published disease epidemiological statistics and the 2014 use reports provided by the Leksell Gamma Knife Society (16,750 cases)...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27900325/giant-idiopathic-renal-arteriovenous-fistula-managed-by-coils-and-amplatzer-device-case-report-and-literature-review
#5
Prashant Nagpal, Girish Bathla, Sachin S Saboo, Ashish Khandelwal, Abhishek Goyal, Frank J Rybicki, Michael L Steigner
An idiopathic renal arteriovenous (AV) fistula is a rare malformation of the kidney that may present insidiously with heart failure or hematuria. The treatment may be challenging due to large fistula size that may limit endovascular management. The authors report a case of an 85-year-old Caucasian woman who presented with acute heart failure and was found to have a right renal AV fistula. Since she had no prior history of renal intervention or trauma, a diagnosis of idiopathic renal AV fistula was made. She was managed by endoluminal occlusion using multiple stainless steel coils and Amplatzer vascular plug II device...
November 16, 2016: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/27900277/incidentally-diagnosed-multiple-vascular-lesions-of-the-spleen-littoral-cell-angioma-or-hemangioma
#6
Emrah Aydin
Vascular lesions of the solid abdominal viscera may pose diagnostic and management issues. A 16-year old girl admitted to emergency department due to recurrent abdominal pain and diagnosed to have multiple vascular malformations of the spleen on imaging investigations. Littoral cell angioma was preoperative suspicion owing to no response of the vascular lesion to the propranolol. It turned out to be cavernous hemangioma on histopathology.
November 2016: APSP Journal of Case Reports
https://www.readbyqxmd.com/read/27897192/pi3-kinase-inhibition-improves-vascular-malformations-in-mouse-models-of-hereditary-haemorrhagic-telangiectasia
#7
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/27896260/a-case-of-prenatally-diagnosed-extrapulmonary-arteriovenous-malformation-associated-with-a-complex-heart-defect
#8
Ba-Da Jeong, Hye-Sung Won, Suah An, Ji Yeon Kim, Mi-Young Lee, Eun Na Kim, Jung-Sun Kim, Chong Jai Kim
Pulmonary arteriovenous malformations are rare vascular anomalies of the lung, only a few cases of which have been diagnosed prenatally. The diagnostic clue for prenatal diagnosis was cardiomegaly with a particularly enlarged left atrium. All previous cases of pulmonary arteriovenous malformations diagnosed prenatally have been reported as an isolated anomaly or in association with simple heart defects. We here describe the first case of a pulmonary arteriovenous malformation with a complex heart defect that was diagnosed prenatally at 21...
November 2016: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/27894790/venous-malformations-of-the-head-and-neck-current-concepts-in-management
#9
REVIEW
C Fowell, C Verea Linares, R Jones, H Nishikawa, A Monaghan
Low-flow venous malformations are congenital lesions and they are the third most common vascular anomaly in the head and neck. In this paper, the third in a series of three educational reviews, we discuss current trends in their management, and include a summary of common sclerosant agents used in their control.
November 25, 2016: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/27890761/the-coexistence-of-extradural-arteriovenous-fistula-and-soft-tissue-arteriovenous-malformation-within-the-same-metamere
#10
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/27885298/klippel-trenaunay-syndrome-a-case-report
#11
R K Sah, S Sharma, S Ghimire, B B Bagale, M Kayastha, R H Chapagain
Klippel-Trenaunaysyndrome(KTS) is a rare congenital condition usually presenting with port wine stains, excessive growth of bones and soft tissue and varicose veins which most commonly occurs in the legs, but it also may affect the arms, face, head, or internal organs. We report a case of term male neonate with clinical findings of Port-wine stain, multiple cystic swellings with ultrasonographic findings suggestive of vascular malformations and limb abnormalities in the form ofsoft tissue hypertrophy of right upper limb, polydactyly of right hand and syndactyly of left hand consistent withKlippel-Trenaunay syndrome...
May 2016: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/27884880/first-pass-contrast-enhanced-mra-for-pretherapeutic-diagnosis-of-spinal-epidural-arteriovenous-fistulas-with-intradural-venous-reflux
#12
S Mathur, S P Symons, T J Huynh, P Muthusami, W Montanera, A Bharatha
BACKGROUND AND PURPOSE: Spinal epidural AVFs are rare spinal vascular malformations. When there is associated intradural venous reflux, they may mimic the more common spinal dural AVFs. Correct diagnosis and localization before conventional angiography is beneficial to facilitate treatment. We hypothesize that first-pass contrast-enhanced MRA can diagnose and localize spinal epidural AVFs with intradural venous reflux and distinguish them from other spinal AVFs. MATERIALS AND METHODS: Forty-two consecutive patients with a clinical and/or radiologic suspicion of spinal AVF underwent MR imaging, first-pass contrast-enhanced MRA, and DSA at a single institute (2000-2015)...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884878/comparison-of-3-different-types-of-spinal-arteriovenous-shunts-below-the-conus-in-clinical-presentation-radiologic-findings-and-outcomes
#13
T Hong, J E Park, F Ling, K G terBrugge, M Tymianski, H Q Zhang, T Krings
BACKGROUND AND PURPOSE: Spinal arteriovenous shunts below the conus constitute 3 types of lesions, which have previously been mainly described in case reports, given their rarity, and are sometimes misdiagnosed. The purpose of this study was to describe the features of each type and compare these types as to epidemiologic features, clinical and radiologic presentations, treatment, and outcomes in a consecutive series of 48 cases. MATERIALS AND METHODS: The prospectively collected data bases of 2 referral centers for spinal vascular lesions were retrospectively reviewed...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884452/factors-associated-with-thrombotic-complications-in-pediatric-patients-with-vascular-malformations
#14
Pablo Sepúlveda, Alejandro Zavala, Pamela Zúñiga
BACKGROUND AND OBJECTIVES: Thrombosis is an uncommon disorder in children. Patients with slowflow vascular malformations have higher risk of developing localized intravascular coagulation, which is closely related to the presence of thrombotic events. These episodes cause pain, can be recurrent and determine a clear deterioration in the quality of life. Moreover, serious complications such as pulmonary thromboembolism and eventually death have been described. The aim of the present study is to identify clinical and laboratory risk factors associated with thrombotic events in pediatric patients with vascular malformations...
November 6, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27882637/transplantation-associated-thrombotic-microangiopathy-isolated-to-a-congenital-anomaly-of-the-lung
#15
Rebecca T Kummen, Geoffrey D E Cuvelier, Camelia Stefanovici, Anamarija M Perry, Rick Higgins, Rochelle Yanofsky, Suyin A Lum Min, Donna A Wall
TA-TMA is a post-hematopoietic stem cell transplant complication with clinical features of hemolytic anemia and thrombocytopenia. A 26-month-old child who had had an allogeneic transplant for treatment of DBA developed severe TA-TMA with heavy red blood cell and platelet transfusion dependence. Incidentally, he was found to have a lung sequestration. TA-TMA resolved and transfusion dependence resolved after resection of the sequestration. The finding suggests the malformation vasculature was selectively vulnerable to the trigger of TA-TMA-raising perhaps a clue to basic pathophysiology of TA-TMA and/or vascular malformations...
November 24, 2016: Pediatric Transplantation
https://www.readbyqxmd.com/read/27881343/-surgical-management-of-proximal-anterior-cerebral-artery-a1-aneurysms
#16
Hua-Wei Wang, Zhe Xue, Yu-Dong Ma, Wen-Xin Wang, Chen Wu, Zheng-Hui Sun
OBJECTIVE: To review our experience in surgical management of proximal anterior cerebral artery (A1) aneurysms in 23 patients. METHODS: Between January, 2004 and December, 2014, 23 patients (1.6%) with A1 aneurysms diagnosed by CTA or DSA were treated surgically. The "3H" therapy was adopted for postoperative prevention of cerebrovascular spasm. All the patients were followed up and examined with cerebrovascular CTA at 6, 12, 48 and 60 months after the operation with their Glasgow Outcome Scale score recorded...
November 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27878613/intermittent-low-dose-bevacizumab-in-hereditary-hemorrhagic-telangiectasia-a%C3%A2-case-report
#17
Florian Huemer, Martin Dejaco, Christoph Grabmer, Thomas Melchardt, Daniel Neureiter, Georg Mayer, Alexander Egle, Richard Greil, Lukas Weiss
BACKGROUND: Hereditary hemorrhagic telangiectasia is an inherited autosomal dominant disease presenting with recurrent bleeding episodes and iron deficiency anemia due to vascular malformations. Hereditary hemorrhagic telangiectasia is associated with an increased risk of stroke, gastrointestinal bleeding and pulmonary hypertension and life expectancy is significantly reduced. Excess vascular endothelial growth factor (VEGF) plays a key role in the pathophysiology of the disease. CASE PRESENTATION: Here we report about a male patient with hereditary hemorrhagic telangiectasia presenting with pulmonary and central nervous system involvement experiencing repetitive nosebleeds, necessitating frequent local cauterization and transfusion of more than 100 units of packed red blood cells...
November 23, 2016: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/27878447/morbidity-and-healthcare-costs-of-vascular-anomalies-a-national-study
#18
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/27874028/a-mouse-model-of-hereditary-hemorrhagic-telangiectasia-generated-by-transmammary-delivered-immunoblocking-of-bmp9-and-bmp10
#19
Santiago Ruiz, Haitian Zhao, Pallavi Chandakkar, Prodyot K Chatterjee, Julien Papoin, Lionel Blanc, Christine N Metz, Fabien Campagne, Philippe Marambaud
Hereditary hemorrhagic telangiectasia (HHT) is a potentially life-threatening genetic vascular disorder caused by loss-of-function mutations in the genes encoding activin receptor-like kinase 1 (ALK1), endoglin, Smad4, and bone morphogenetic protein 9 (BMP9). Injections of mouse neonates with BMP9/10 blocking antibodies lead to HHT-like vascular defects in the postnatal retinal angiogenesis model. Mothers and their newborns share the same immunity through the transfer of maternal antibodies during lactation...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27869147/interplay-between-vegf-and-nrf2-regulates-angiogenesis-due-to-intracranial-venous-hypertension
#20
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
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