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Search Results: 1 - 10 of 886 matches for " Arteriovenous malformation "
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A Scrotal Arteriovenous Malformation: A Case Report  [PDF]
Nobuhiro Sato, Tomoaki Kuroki, Yasuyoshi Tosa, Taro Kusano, Shinya Yoshimoto
Modern Plastic Surgery (MPS) , 2014, DOI: 10.4236/mps.2014.41004
Abstract:

Purpose: Haemangiomas and vascular malformations are not easy to differentiate clinically. We describe a patient who was initially thought to have a scrotal venous malformation (VM) but after pathological examination was diagnosed to be afflicted with an arteriovenous malformation (AVM) with a micro-fistula in pathorogical photo. We think that even if there are suspicions of VM before the operation, the importance of resection with an ample margin of safety is indicated. Material and Method: A 38-year-old man who noticed a mass in his scrotum. The patient was seen at our hospital in May 2009 with concern for progression of the scrotal mass. That mass appeared to indicate a simple case of VM of the scrotum. Result and Conclusion: A biopsy of the mass was performed and was diagnosed to be a micro-fistula AVM, with no tumour growth in the vascular endothelial cells. Resection was performed in September 2009. And there is no recurrence. Even if there are suspicions of VM before the operation, the importance of resection with an ample margin of safety is indicated.

Estimation of Treatment Benefit in Patients with Cerebral Arteriovenous Malformations  [PDF]
Peter Lindvall, Patric Blomstedt, A. Tommy Bergenheim
Open Journal of Modern Neurosurgery (OJMN) , 2012, DOI: 10.4236/ojmn.2012.23007
Abstract: Background: Cerebral arteriovenous malformations (AVMs) are vascular lesions that may be associated with a significant morbidity and mortality. There is still today no consensus regarding treatment of unruptured AVMs. Using known data from the literature, and data from our own institution concerning stereotactic radiotherapy, our aim was to construct an equation that may be used to evaluate the benefit of intervention vs. conservative treatment in unruptured AVMs. Methods: Assuming an annual bleeding risk of 4% and previously reported mortality (29%) and morbidity (16%) rates after a bleeding from an AVM, an equation was constructed. This equation would estimate the time until the combined mortality and morbidity associated with conservative treatment would equal the mortality and morbidity of stereotactic radiotherapy. Results: Using stereotactic radiotherapy this treatment would benefit over conservative treatment in excess of 8.12 years. The risk of bleeding was the most important factor influencing the benefit of intervention vs. conservative treatment. Conclusions: We argue that that it may be possible to estimate the benefit of intervention vs. conservative treatment in an unruptured AVM. This may be achieved using our proposed equation and data specific to each center performing treatment for AVMs.
Surgical strategy in case with co-existence of malignant oligodendroglioma and arteriovenous malformation: A case report  [PDF]
Hirohito Yano, Noriyuki Nakayama, Naoyuki Ohe, Toshinori Takagi, Jun Shinoda, Toru Iwama
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.28125
Abstract: A brain tumor associated with an arteriovenous malformation (AVM) is very rare. A 42-year-old female presented with two separate lesions in her right frontal lobe on MRI. An angiogram diagnosed one of the lesions as an AVM. The second lesion appeared to be a tumor. Tumor removal was difficult due to bleeding from the nearby AVM, necessitating removal of the AVM and allowing complete excision of the tumor. Histopathological analysis revealed the tumor was an anaplastic oligodendroglioma. There was no recurrence of the tumor 5 year after completion of therapy. We discuss the operative strategy in case of synchronous diseases and provide a review of the literature.
Computed Tomography Angiography Compared to Catheter Based Angiography in Evaluation of Cerebral Arterial Aneurysm and Arteriovenous Malformation  [PDF]
Sahar M. Badr, Zuber Ahmed, Maway A. Khafaji, Khalid G. H. Alsafi, Hanan Y. Abbas, Saddig D. Jastaniah
Open Journal of Medical Imaging (OJMI) , 2014, DOI: 10.4236/ojmi.2014.43017
Abstract: Both cerebral arterial aneurysm and arteriovenous malformation are cerebrovascular disease, which required immediate diagnosis and urgent treatment. Since the introduction of multislice CT scanners, CT angiography (CTA) has become a powerful tool for imaging the vascular system. The goal of this study is to compare catheter based angiography and CTA in the evaluation of cerebral arterial aneurysm and arteriovenous malformation AVM. A retrospective analysis of 50 patients for exploring the record of patient who underwent both multislice CT angiography (MSCTA) and catheter based angiography before treatment is presented during last one year in the department of Radiology, King Fahd Hospital-Jeddah, Kingdom of Saudi Arabia. The sensitivity of CTA for picking up aneurysm is 86% and the sensitivity of catheter based angiography for picking up aneurysm is 97%. The specificity of CTA for picking up aneurysm is (76%), the false positive cases are (3%) and the false negative cases are 10%. The sensitivity of both CTA and catheter based angiography for picking up arteriovenous malformation is (90%). The specificity of CTA for picking up AVM is (76%), the false positive cases are (10%) and no false negative cases in CTA are found. The sensitivity and specificity of catheter based angiography is 100% in diagnosis and detection of cerebral arterial aneurysm and AVM. The present study concluded that CTA has high sensitivity and specificity in detecting aneurysm and AVM enough to be chosen as the first step. Catheter based angiography, still a gold standard for radiology examination, is the most accurate, sensitive and specific method in diagnosis and detection of cerebral arterial aneurysm and arteriovenous malformation, which can be done as the second step. In addition, catheter based angiography is done for treatment planning, treatment with interventional procedure and for prognosis after treatment.
Gold Nanoparticles in Stereotactic Radiosurgery for Cerebral Arteriovenous Malformations  [PDF]
Frederik Vernimmen, Mikhail L. Shmatov
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2015, DOI: 10.4236/jbnb.2015.63019
Abstract: Objective of the study: To explore the potential for therapeutic gain with gold nanoparticles in arteriovenous malformation radiosurgery based on their interaction with photons and protons. Study methods: Radiation dose enhancement resulting from the interaction of gold nanoparticles with irradiation ranging from kilovoltage to megavoltage photons and protons was researched in the literature. The role of angiogenesis and its regulation via vascular endothelial growth factors and cell membrane receptors, especially for endothelial cells in arteriovenous malformations, was investigated as a way for selective arteriovenous malformation deposition. Results: Radiation dose enhancement with gold nanoparticles is described in the literature but has so far only been investigated for its potential in treating malignancies. Because of the high atomic number of gold (Z = 79), dose enhancement occurs with photons mainly based on secondary photon and Auger electron production and the dose enhancement factor is the highest for irradiation with kilo voltage photons. Dose enhancement happens with megavoltage photons also but to a lesser extend and is mainly due to the ionization of gold by secondary photons and electrons generated by the megavoltage photons passing through tissue. The range of the secondary photo electrons emitted by gold is sufficient to cover the entire endothelial cell content. Protons interact with the production of Auger electrons which have a very short range, insufficient to cover the entire contents of endothelial cells, but sufficient to cause a high cell membrane dose for membrane located gold nanoparticles (AuNPs). Arteriovenous malformations are dynamic entities with angiogenesis taking place. This is reflected by a different expression of angiogenic receptors on the membrane of arteriovenous malformation endothelial cells compared to normal brain blood vessels, thereby opening the opportunity for selective deposition of such particles. For the use in proton therapy a new definition for the dose enhancement factor describing the local effect of nanoparticles is proposed. Conclusion: The concept of nanoparticle enhanced radiosurgery for arteriovenous malfor-mations by selective deposition of gold nanoparticles is a novel approach. The local dose enhancement opens the way for therapeutic gain which in turn could lead to improved obliteration rates and/or a shorter latent period.
Clipping of Lateral Posterior Choroidal In-traventricular Aneurysm Related to Ruptured Temporal Arteriovenous Malformation: Case Report  [PDF]
Jaime López Calle, Rommel Arbulú Zuazo, Ronald Pascual Valverde, Walter Colunga Cáceres, Katya Chávez Barboza, César Fustamante Torres, Yosimar Coasaca Tito, Luis Mu?oz Chumbes
Open Journal of Modern Neurosurgery (OJMN) , 2016, DOI: 10.4236/ojmn.2016.61002
Abstract: Background: Intraventricular cerebral aneurysms are uncommon brain vascular disease in general population. The previous reported cases point with more frequency to Moyamoya disease as the main factor to originate aneurysms in the choroidal arteries. Those related to an AVM are even rarer and only two cases have been previously reported. Aim: To discuss the unusual location of this aneurysm, its relationship to other conditions and the type of treatment. Case Presentation: We present the case of a patient with a non-ruptured intraventricular aneurysm of lateral posterior choroidal artery related to a ruptured right temporal arteriovenous malformation, who was successfully treated by clipping immediately, after resection of the malformation. Conclusion: Intraventricular choroidal artery aneurysm is a rare pathology. Its deep location makes the treatment challenging but mandatory due to the high probability of bleeding, especially those flow-related to an arteriovenous malformation.
A Multi-Disciplinary Approach of a Patient with Extensive Arterio-Venous Malformations Undergoing a C-Section  [PDF]
Jing Song,Sudheera Kokkada Sathyanarayana,Louvonia Boone,Vilma Joseph
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.34051
Abstract: The presence of both uterine and arteriovenous malformation in a patient is rare. For these patients a cesarean section can be life threatening due to uncontrolled massive hemorrhage. Prevention and control of massive blood loss utilizing a multidisciplinary approach can be lifesaving. We present a case report of a 33 years old pregnant woman at 35 weeks of gestation diagnosed with an extensive uterine arteriovenous malformation and innumerable tortuous vessels who was scheduled for a cesarean section. Her previous vaginal delivery was complicated by significant bleeding requiring uterine artery embolization. Pre-operative prophylactic aortic and right iliac artery balloon occlusion catheters were placed under monitored anesthesia care. The extracorporeal life support team was available to initiate veno-venous or arteriovenous bypass. Cesarean section was performed with careful identification of the uterine vessels under ultrasound guidance and ultimately the bleeding was well controlled. Postoperatively, the patient underwent uterine artery embolization. It is our strong belief that although we did not face a major disaster during this cesarean section, our comprehensive plan and multi-disciplinary approach were essential to ensuring the safety of the parturient and newborn.
A Multi-Disciplinary Approach of a Patient with Extensive Arterio-Venous Malformations Undergoing a C-Section  [PDF]
Jing Song, Sudheera Kokkada Sathyanarayana, Louvonia Boone, Vilma Joseph
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.34051
Abstract:

The presence of both uterine and arteriovenous malformation in a patient is rare. For these patients a cesarean section can be life threatening due to uncontrolled massive hemorrhage. Prevention and control of massive blood loss utilizing a multidisciplinary approach can be lifesaving. We present a case report of a 33 years old pregnant woman at 35 weeks of gestation diagnosed with an extensive uterine arteriovenous malformation and innumerable tortuous vessels who was scheduled for a cesarean section. Her previous vaginal delivery was complicated by significant bleeding requiring uterine artery embolization. Pre-operative prophylactic aortic and right iliac artery balloon occlusion catheters were placed under monitored anesthesia care. The extracorporeal life support team was available to initiate veno-venous or arteriovenous bypass. Cesarean section was performed with careful identification of the uterine vessels under ultrasound guidance and ultimately the bleeding was well controlled. Postoperatively, the patient underwent uterine artery embolization. It is our strong belief that although we did not face a major disaster during this cesarean section, our comprehensive plan and multi-disciplinary approach were essential to ensuring the safety of the parturient and newborn.

Hemangioma verrucoso
Fran?a, Emmanuel Rodrigues de;Gurgel, Aldejane;Campos, Trícia;Souza, Juliana de A.;Fran?a, Kelly;Azevedo, Renata;
Anais Brasileiros de Dermatologia , 2006, DOI: 10.1590/S0365-05962006000900008
Abstract: verrucous hemangioma is an uncommon vascular malformation, characterized by vascular proliferation and dilation from dermis to subcutaneous tissue, and proliferative reaction of the epidermis. the authors report a case of verrucous hemangioma, making a brief review of its clinical, histopathological and therapeutic aspects.
Malformación arteriovenosa de localización craneofacial
Iwanyk,Paulina; Traine,Ernesto; Iacouzzi,Sebastián; Rodríguez Lofredo,Anselmo;
Archivos argentinos de pediatr?-a , 2007,
Abstract: vascular malformations are defects of the vascular system during embryologic development. at birth they can appear as port-wine stains that can sometimes increase in size during puberty and as a consequence of trauma. the complete resection of arteriovenous malformations (high flow malformations) in head and neck is very difficult due to bleeding and danger of damaging vital organs. in november 2003 we performed a complete resection of a forehead a.v.m with extension to the orbit in a 17 year-old teenager male. first, we identified and took control of the main vessels feeding the tumor, and then we performed a continuous suture with absorbable material around the tumor including soft tissues and periostium.
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