Posterior Meningeal Artery Research Articles

Brain lymphatic vessels accompanying meningeal arteries in the human

IntroductionRecent studies showed the connection between cerebrospinal fluid (CSF) and deep cervical lymph nodes (dCLN) via lymphatic vessels (LV)s. These LVs accompany dural sinuses, cranial nerves, and arteries. The present study aimed to show in addition to the main trunk of the middle meningeal artery (MMA) whether the anterior and posterior branches of MMA; the anterior (AMA) and posterior (PMA) meningeal arteries also have a role in brain lymphatic drainage in humans. Materials and methodSamples of the middle meningeal artery (MMA) and its two main branches (anterior and posterior), anterior and posterior meningeal arteries (AMA and PMA) were obtained from 3 cadavers and 6 autopsies. Podoplanin (PDPN) (lymphatic endothelial marker) and CD31 (vascular endothelial marker) immunohistochemistry (IHC) were applied to 5 μm thick transverse sections and counterstained with hematoxylin. Furthermore, western blotting techniques were applied to the same tissue samples in 3 autopsy cases to demonstrate the presence of PDPN. ResultsWe observed the presence of the LVs along the main trunk of MMA and its two branches, AMA, and PMA. The LVs along the MMA (main trunk) had a larger diameter range than its branches and the AMA and PMA. The diameter of LVs of the PMA was larger than AMA. Furthermore, fluid channels with varying diameters and densities were closely localized to the LVs. The western blot PDPN protein expression confirmed IHC results. ConclusionThe LVs along the main trunk, anterior and posterior branches of the MMA, AMA, and PMA also provide an extracranial pathway for thought drainage of waste from the brain tissue in humans. Thus, the organization of the extracranial transport of LVs of the brain should be well-defined for understanding the role of lymphatic drainage in various neurological diseases.

Transarterial Embolization of Intracranial Dural Arteriovenous Fistulas Cognard Type V With Direct Drainage Into the Perimedullary Veins: Case Report and Literature Review.

Cognard type V fistula (CVF) is a rare type of dural arteriovenous fistula characterized by spinal perimedullary venous drainage. Owing to the lack of pathognomonic findings, misdiagnosis is common. Patients often undergo multiple spinal angiograms negative for spinal vascular malformations. Digital subtraction angiography is the gold standard diagnostic tool. The preferred treatment option is endovascular management with embolization through a transarterial, transvenous, or combined approach. Other options include open surgery, stereotactic radiosurgery, or a combination of both. The patient from case # 1 presented with progressive weakness and hypoesthesia in the bilateral lower extremities, with urinary and bowel incontinence. The DSA identified a CVF fed by the meningohypophyseal trunk and a draining perimedullary vein. Embolization with 0.1 ccs of Onyx-18 was performed with complete fistula occlusion. The patient from case # 2 developed bilateral lower extremity weakness, diffuse numbness, and urinary incontinence. The DSA showed a CVF fed by tributaries from the ascending pharyngeal artery and posterior meningeal artery branches of the V3 segment, draining into a perimedullary vein. Embolization with 0.3 cc of Onyx-18 was performed with 100% occlusion of the fistula. A 1-year follow-up angiogram confirmed complete fistula occlusion. Both patients consented to the procedure. Even if a patient only presents symptoms of myelopathy, CVF should be considered. Herein, we present 2 cases of CVF with direct drainage into the perimedullary veins which presented exclusively with myelopathy syndrome and describe treatment with trasarterial embolization with Onyx.

A Surgical Case of Hemifacial Spasm Due to Tentorial Meningioma -peritorcular type- in Posterior Fossa

Hemifacial spasm is commonly caused by compression of the facial nerve due to overlying vessels, and also due to various types of tumor or aneurysm, and other factors. It occurs, although rarely, as a secondary effect of cerebellar or brainstem shift resulting from a tumor. In such a case, the presence of a large tumor often leads to additional neurological deficits. We present a case of hemifacial spasm caused by a peritorcular type of large tentorial meningioma in the posterior fossa. A 68-year-old woman presented with right facial numbness 4 months ago and right hemifacial spasm 2 weeks ago. Upon visiting our hospital, she displayed no neurological deficits other than the right hemifacial spasm. MRI revealed a peritorcular type of large tentorial meningioma in the posterior fossa with perifocal edema. The right cerebellopontine cistern was narrowed, and the cerebellar tonsil was herniated. The right facial nerve ran adjacent to the anterior inferior cerebellar artery (AICA). Angiography showed that only the left posterior meningeal artery (PMA) flowed to the tumor. The loop of the right AICA extended into the right cerebellopontine cistern. After embolization of the PMA, the tumor was surgically removed, leading to an improvement in the patient's hemifacial spasm. Postoperative MRI confirmed complete removal of the tentorial meningioma without any contact with the right facial nerve. The hemifacial spasm was caused secondarily by the cerebellar or brainstem shift due to the large tentorial meningioma in the posterior fossa. This large tumor had not produced any other neurological deficits before the hemifacial spasm appeared. We report this case because it is extremely rare.

Posterior inferior cerebellar artery originating from the posterior meningeal artery mimicking dural arteriovenous fistula.

Many variations in the origin of the posterior inferior cerebellar artery (PICA) have been reported. To our knowledge, only one case of a PICA originating from the posterior meningeal artery (PMA) has been reported. We describe a case with a PICA that was supplied retrograde from the distal segment of the PMA, mimicking a dural arteriovenous fistula on magnetic resonance angiography (MRA). A 31-year-old man was admitted to our hospital with a sudden occipital headache and nausea. MRA showed a hyperplastic left PMA, continuing to an abnormal vessel that was suspicious for venous drainage. Digital subtraction angiography revealed the left PMA originated from the extradural segment of the vertebral artery and then connected to the left PICA near the torcula. The cortical segment of the PICA flowed retrograde, which appeared as venous reflux on MRA. A second PICA originated from the extradural segment of the left vertebral artery and perfused the tonsillomedullary and televelotonsillar segment of the left PICA territory. We present an anatomical variant of the PICA mimicking a dural arteriovenous fistula. Digital subtraction angiography is useful for diagnosis of the cortical segment of the PICA flowing retrograde from the distal segment of the PMA because signal intensity in MRA of retrograde flow tends to decrease and diagnosis may be difficult. During endovascular treatment and open surgery, we should note that ischemic complications may occur due to the potential anastomosing channels between cerebral and dural arteries.

Abstract Number ‐ 116: Palliative Embolization on an Infantile Dural Sinus Malformation with Giant Lakes.

Introduction Dural Sinus Malformation (DSM) is a rare and high risk mortality vascular pathology identified early postnatal due to common clinical symptoms like macrocephaly, downward wandering eyes, bulging and pulsatile fontanels and heart failure. Most DSMs resolves prenatally. It is characterized by giant venous lake at the torcular region expanding towards the infratentorial and supratentorial spaces with usually existence of Dural arteriovenous fistulas (dAVF). Pathophysiology of DSMs are ballooning and malformation of the distal jugular bulb or persistence abnormal of the transverse sinus. Methods We performed the staged trans arterial Onyx‐18 embolization 5 times of a 3 mo infant boy with dural sinus malformation with multiple arteriovenous fistula using the 4 French GlideSim 2 Catheter, Headway Duo 167 micro catheter, and numerous microwires including Aristotle 014, Chikai Black Soft 014 and 010 and Synchro 014, 010 and 080 through alternated sides of transfemoral accesses. Embolizations were performed through the bilateral branches of the left and right middle meningeal arteries, posterior meningeal arteries and left occipital artery. Limitations during procedure are body weight to use contrast, fluoroscopy time and access sides. Results Post embolization injections demonstrated significant flow reduction into the malformation through ECA branches. No neurological complications occurred due to the procedures. MRI Brains in following weeks did not show large thrombus formation, hydrocephalus, or parenchymal injury. Patient showed clinical improvements with stable macrocephaly and decreased frontal pulsation and bulging. Conclusions Staged trans arterial embolization seems a safe approach on high mortality DSM. Thrombus is not formed all at once and mass effect from thrombosed sinus is avoided. Sinus has time to shrink.

Acquired Chiari Type I Malformation Associated with Type IV Dural Arteriovenous Fistula: Case Report.

Chiari malformations, usually congenital, can rarely be associated with arteriovenous (AV) fistulas. We present the first case involving a type IV dural AV fistula with a Chiari type I malformation. Retrospective chart review was performed to obtain pertinent details regarding history and examination, pathologic findings, and treatment course. A 63-year-old woman with a 2-year history of migraines presented with 5 months of occipital, right-sided headaches and neck pain exacerbated by Valsalva maneuvers. Computed tomography (CT) and magnetic resonance imaging (MRI) of the head showed a possible right occipital AV malformation, bilateral cerebellar subdural hygromas, and tonsillar crowding at the foramen magnum indicating an acquired Chiari type I malformation. Angiography demonstrated a Cognardtype IV right posterior occipital dural AV fistula supplied by bilateral middle meningeal and posterior meningeal arteries. After treatment of the dural AV fistula, hygroma evacuation, and decompression of the acquired Chiari malformation, the patient's Valsalva-induced headaches abated.

Rupture of posterior meningeal artery aneurysm: case report

An aneurysm of the posterior meningeal artery is a rare pathology. However, rupture of this aneurysm can lead to serious consequences for the patient's health. For the surgical treatment, both microsurgical and endovascular methods are used. A 19-year-old patient was admitted to our hospital on day 21 after suffering a subarachnoid-ventricular hemorrhage from an aneurysm of the right posterior meningeal artery. On admission, the patient complained of a headache. Cerebellar symptoms were noted in the neurological status. According to digital subtraction angiography, the patient had an anastomosis between the posterior meningeal artery and the hypoplastic p1-segment of the right posterior inferior cerebellar artery distal to the aneurysm. Endovascular method was used to occlude the aneurysm with a detachable coil. The patient was discharged on the third day with total regress of neurological symptoms. Control cerebral angiography 3 months later showed thrombosis of the aneurysm with the supporting segment of the parent artery, as well as restructuring of the main blood flow of this basin through the previously hypoplastic posterior inferior cerebellar artery. In the literature, we found only 9 such cases. Endovascular treatment of this pathology is, in our opinion, effective and safe, and the presence of an anastomosis distal to the aneurysm made it possible to avoid disruption of blood supply in the vascular basin of the affected artery.Received 21 September 2021. Revised 11 October 2021. Accepted 18 October 2021.Funding: The study did not have sponsorship.Conflict of interest: Authors declare no conflict of interest.Contribution of the authors: The authors contributed equally to this article.

Abstract 1122‐000117: Transcranial Arterial Embolization of an dAVF: A Case Report

Introduction : We detail the management of a woman with a posterior fossa dAVF (dural arteriovenous fistula) that was unable to be treated by standard transarterial or transvenous embolization or microsurgical ligation. She underwent craniotomy for surgical exposure and direct access of her left middle meningeal artery followed by microcatheter embolization with favorable results. Methods : This is a case report, which describes a case of a difficult to access dAVF. Results : A 72 year‐old woman presented with vertigo, nausea, and vomiting one week following a fall. CT head disclosed cerebellar vermis intraparenchymal hematoma and CT head angiography was suspicious for underlying vascular malformation. Diagnostic cerebral angiogram demonstrated extensive tentorial and suboccipital dural arteriovenous fistula (dAVF) fed by branches of both middle meningeal and occipital arteries with direct cortical venous drainage and venous aneurysmal ectasia directly adjacent to the vermian hemorrhage (ruptured Cognard grade 4). Left vertebral artery angiogram demonstrated excessive tortuosity of vertebral enlarged posterior meningeal artery, which was unable to be catheterized sufficiently beyond its origin despite different microwires and microcatheters due to tortuosity. Transfemoral venous approach was also attempted, however, this was also unsuccessful and decision was made to proceed with microsurgical treatment. The following day a suboccipital craniotomy was performed, but was ultimately aborted due to nearly uncontrollable bleeding from bony exposure and dural access secondary to severe venous hypertension. The next day percutaneous endovascular treatment was attempted a second time. A small right middle meningeal artery (MMA) contribution to the fistula was embolized with liquid embolic but, again because of excessive tortuosity and insufficient microcatheter access, right MMA occlusion occurred without embolic agent reaching the fistula. Similar access related difficulties due to tortuosity were encountered in accessing the left middle meningeal and occipital arteries contributing to the fistula. Repeat transvenous access was also attempted from the occipital and right transverse sinuses, but microcatheter access to the fistula was unable to be established beyond the venous outflow from the aneurysm, and, given the risks of hemorrhage related to embolization of the venous outflow without occluding arterial inflow into the ruptured aneurysm, transvenous embolization was not performed. A few days later, after the patient was given time to recover from the prior procedures, the patient underwent left temporal craniotomy in a hybrid operating room/interventional radiology suite for direct cannulation of the left MMA. Localization of the craniotomy site over the left MMA access point was planned by transfemoral cerebral angiogram and a transcarotid/peripheral access kit was used to catheterize the left MMA directly following surgical exposure. An .017 microcatheter was advanced close to the fistula point using standard biplanar roadmap fluoroscopy, and Onyx embolization of the fistula was performed to complete occlusion, without complication. Conclusions : For cerebrovascular disorders that are inaccessible by traditional endovascular and surgical means, a hybrid approach should be considered.

Lateral Variant of Davidoff and Schechter Dural Arteriovenous Fistula

Dural arteriovenous fistulas represent a distinct direct pathological connection between dural arterial feeders of the meninges to cortical veins or sinuses. Vascular supply of the meninges is provided by a series of named arteries-anterior, middle, and posterior meningeal arteries, with the tentorium provided by the artery of Bernasconi and Cassinari (anterior-medial) and the artery of Davidoff and Schechter (posterior-medial). This case is the first report in the literature of a lateral distal posterior cerebral artery supplying the meninges and contributing dural feeders to a Cognard type III/Borden type III dural arteriovenous fistula.

Dilated MMA sign in cDAVF and other arterial feeders on 3D TOF MRA.

BackgroundAmong the varied causes of pulsatile tinnitus, the condition that can cause severe mortality and morbidity is a cranial dural arteriovenous fistula (cDAVF). This study aimed to assess the diagnostic accuracy of the dilated middle meningeal artery on three-dimensional time-of-flight magnetic resonance angiography in cranial dural arteriovenous fistula and to identify other feeders that can aid in the detection of these lesions.MethodMagnetic resonance angiography and digital subtraction angiography data of all patients with cranial dural arteriovenous fistula treated in a single tertiary referral center between 2007–2020 were included. The middle meningeal artery and other feeders recorded from digital subtraction angiography were assessed on magnetic resonance angiography.ResultsThe overall agreement between readers in identifying the dilated middle meningeal artery was substantial (κ = 0.878, 95% confidence interval: 0.775–0.982). The dilated middle meningeal artery indicated the presence of a cranial dural arteriovenous fistula with a sensitivity of 79.49% (95% confidence interval: 66.81–92.16), specificity of 100% (95% confidence interval: 100.00–100.00), and negative predictive value of 94.56% (95% confidence interval: 90.89–98.02). An area under the curve of 0.8341 was observed for the ipsilateral middle meningeal artery, with a sensitivity of 92.2% and a specificity of 75.0% at a cut-off of 0.30 mm for identifying a cranial dural arteriovenous fistula. Of 73 other feeders, the occipital, meningohypophyseal trunk, ascending pharyngeal, and posterior meningeal arteries contributed to a large proportion visualized on magnetic resonance angiography (83.6% (41/49)).ConclusionThe dilated middle meningeal artery sign is useful for identifying a cranial dural arteriovenous fistula. Dilatation of the occipital and ascending pharyngeal arteries and meningohypophyseal trunk should be assessed to facilitate the detection of a cranial dural arteriovenous fistula, particularly in the transverse-sigmoid and petrous regions.

Multidisciplinary management of a traumatic posterior meningeal artery pseudoaneurysm: A case report and review of the literature.

BackgroundMeningeal arterial injuries represent <1% of all blunt traumatic brain injuries (TBIs). Middle meningeal artery (MMA) lesions comprise the majority. However, there is little clinical data on posterior meningeal artery (PMA) injuries.Case reportA 69-year-old man was brought to our trauma center after sustaining a fall inside a warehouse. He was GCS (Glasgow Coma Scale) 3 on arrival. Non-contrast CT (computed tomography) brain showed subarachnoid hemorrhage with diffuse cerebral edema and a basilar skull fracture. The patient subsequently underwent emergency ventriculostomy. Immediately after the procedure, further imaging with CTA (computed tomography angiography) head identified a hyperintense posterior cranial fossa lesion, prompting cerebral angiography with identification and embolization of a traumatic PMA pseudoaneurysm. The patient improved and was discharged to a long-term acute care facility. At 3 months post-discharge, the patient was eating, talking with family, and working aggressively with physical therapy.DiscussionThis case represents a functional neurologic outcome from a rare subset of TBI. Early CTA head imaging is not supported by limited literature, but allowed for expedient identification and definitive management of this PMA pseudoaneurysm. In the critical care setting, hyperosmolar therapy, CSF (cerebrospinal fluid) drainage, prompt enteral nutritional support, and early tracheostomy all represent evolving evidence-based strategies to optimize care for severe TBI.ConclusionsThe initial evaluation and management of severe TBI can be nuanced. Future research may refine indications for CTA head to the diagnostic evaluation of patients with both severe TBI and skull fractures.

Role of Surgical Intervention for Intracranial Dural Arteriovenous Fistulas With Cortical Venous Drainage in an Endovascular Era: A Case Series.

Intracranial dural arteriovenous fistulae (dAVFs) with cortical venous drainage (CVD) require treatment because of their aggressive clinical presentation and natural history. Although endovascular treatment is effective for the majority of these lesions in the current endovascular era, surgical management has been required if the lesions are not amenable to or fail endovascular treatments. To demonstrate the angioarchitecture that may necessitate surgical intervention. A retrospective review of the patients with intracranial dAVFs with CVD treated at 2 academic institutions between January 1, 2009, and July 31, 2019 was performed. Patients who required surgical intervention were selected in this study, and angiographic findings were analyzed. A total of 81 dAVFs in 80 patients were treated during the study period. Endovascular treatments were attempted for 72 (88.9%) dAVFs, resulting in complete obliteration in 55 (76.4%). Surgical interventions were performed in 18 (22.2%) dAVFs, resulting in complete obliteration in all lesions. Overall, complete obliteration was achieved in 74 (93.7%) of 79 dAVFs with follow-up. In the surgically treated dAVFs, curative transarterial embolization was deterred by the angioarchitecture, which included dominant feeding vessels from the ophthalmic artery, meningohypophyseal trunk, posterior meningeal artery, pial artery, or ascending pharyngeal artery. Drainage through tortuous cortical vein, deep venous system, or isolated sinus made transvenous approach challenging. Despite continued improvement in endovascular technology, surgical approaches to dAVFs are still of great value as initial and salvage treatment of dAVFs with angioarchitecture hampering endovascular treatment.

Moyamoya disease concurrent with dural arteriovenous fistula: A case report and literature review.

Moyamoya disease (MMD) and dural arteriovenous fistula (DAVF) are two distinct types of intracranial lesion that share different pathogenic mechanisms. Under rare circumstances, patients with MMD have been reported to have concurrent DAVF. The present case study reports on a 47-year-old male admitted due to sudden headache. Head CT revealed hemorrhage of the right thalamus with ventricular extension. On CT angiography, the normal vasculature in the anterior and posterior circulation disappeared and was replaced by moyamoya-like vessels. The patient received conservative management and was discharged 3 days later. After three months, the patient was readmitted for acute cerebellar hemisphere infarction. Angiogram indicated that the DAVF (Cognard classification Ⅰ) was supplied by the left middle meningeal artery, occipital artery and posterior meningeal artery and drained into the transverse-sigmoid sinus and occipital sinus. Conservative management of the DAVF was adopted. The patient was stable and lived independently during a 4-year follow-up. A literature review of the reported cases was also performed to further characterize this rare entity. The management of DAVF concurrent with MMD depends on its clinical presentation and invasiveness. For patients with symptoms or cortical venous drainage, endovascular intervention should be performed. For asymptomatic DAVFs or those without cerebral venous drainage, close follow-up is a reasonable option.

Mechanical Properties of Human Dura Mater in Tension \u2013 An Analysis at an Age Range of 2 to 94 Years

Realistic human head models are of great interest in traumatic brain injury research and in the forensic pathology courtroom and teaching. Due to a lack of biomechanical data, the human dura mater is underrepresented in head models. This study provides tensile data of 73 fresh human cranial dura mater samples retrieved from an area between the anterior middle and the posterior middle meningeal artery. Tissues were adapted to their native water content using the osmotic stress technique. Tensile tests were conducted under quasi-static uniaxial testing conditions with simultaneous digital image correlation. Human temporal dura mater is mechanically highly variable with regards to its elastic modulus of 70 ± 44 MPa, tensile strength of 7 ± 4 MPa, and maximum strain of 11 ± 3 percent. Mechanical properties of the dura mater did not vary significantly between side nor sex and decreased with the age of the cadaver. Both elastic modulus and tensile strength appear to have constant mechanical parameters within the first 139 hours post mortem. The mechanical properties provided by this study can help to improve computational and physical human head models. These properties under quasi-static conditions do not require adjustments for side nor sex, whereas adjustments of tensile properties accompanied with normal aging may be of interest.

Clinical importance of the posterior meningeal artery: a review of the literature.

The posterior meningeal artery, which arises from the vertebral artery, is a critical artery in neurological lesions. However, a comprehensive review of the importance of the posterior meningeal artery is currently lacking. In this study, we used the PubMed database to perform a review of the literature on the posterior meningeal artery to increase our understanding of its role in vascular lesions. The posterior meningeal artery provides the main blood supply to the paramedial and medial portions of the dura covering the cerebellar convexity. The posterior meningeal artery is often involved in dural arteriovenous fistulas occurring near the posterior fossa, and the posterior meningeal artery can be the path for transarterial embolisation or a path through which to monitor the degree of dural arteriovenous fistula embolisation. In posterior circulation ischaemia and moyamoya disease, the posterior meningeal artery can form transdural anastomoses with pial arteries at the surface of the brain, and these can help prevent ischemia. The posterior meningeal artery can also develop aneurysms, most of which are traumatic pseudoaneurysms; patients should therefore be treated in a timely manner or followed up carefully in cases of rebleeding. In addition, during a craniotomy, the posterior meningeal artery should be protected intraoperatively to avoid damaging any transdural anastomosis that may be present. In addition, when the posterior meningeal artery is the main feeding artery of an intracranial tumour, that artery is a satisfactory path for preoperative embolisation. Briefly, the posterior meningeal artery is a very important artery in neurosurgery.

Posterior Meningeal Artery Origin Patterns among 300 Cases and Their Clinical Importance

The posterior meningeal artery (PMA) is known as a dura mater-nourishing vessel. We encountered a patient with Wallenberg syndrome during transarterial embolization of the PMA associated with the dural arteriovenous fistula (DAVF). After development of Wallenberg syndrome in the patient, we assessed origins of the PMA patterns in 300 cases and divided them into 3 types. A 63-year-old man was incidentally diagnosed as having transverse-sigmoid sinus DAVF with a cortical venous reflux. During the transarterial embolization, the patient complained of vertigo and numbness of the right extremities. Postoperatively, the patient exhibited Wallenberg syndrome. Diffusion-weighted magnetic resonance imaging showed a high-intensity area on the lateral side of the right medulla. While performing arterial embolization of the PMA that directly originates from the intracranial vertebral artery, the possibility of deficient brainstem nourishment must be considered.

Safety of Onyx Transarterial Embolization of Skull Base Dural Arteriovenous Fistulas from Meningeal Branches of the External Carotids also Fed by Meningeal Branches of Internal Carotid or Vertebral Arteries.

To analyze the angiographic and clinical results of transarterial embolization with Onyx (Medtronic-Covidien, Irvine, CA) in dural arteriovenous fistulas (DAVFs) partially fed by arteries arising from the carotid siphon or the vertebral arteries. We isolated 40DAVFs supplied by either the tentorial artery of the internal carotid artery (ICA) or the posterior meningeal artery of the vertebral artery. These DAVFs were embolized with Onyx through the middle meningeal artery or the occipital artery. We reviewed the occurrence of reflux into the arteries of carotid or vertebral origin. In all the cases, reflux occurred into the first millimeters of the DAVF arterial feeders arising from carotid or vertebral arteries but slowly enough to be controlled by interruption of Onyx injection. Reflux was always minimal and Onyx never reached the ostium of the arteries. No cerebral ischemic complications occurred in our series. The behavior of Onyx is clearly different from that of cyanoacrylate glue, resulting in superior control during injection. Reflux into arteries arising from the ICA or vertebral artery during DAVF treatment always carries arisk of unintentional non-target embolization of normal cerebral vasculature but Onyx appears to be safe in this situation.

Posterior meningeal artery DMSO injection resulting in reproducible asystole prior to Onyx therapy of a dural arteriovenous fistula: a previously undescribed variant of the trigeminocardiac reflex or a new phenomenon?

We describe a case of reproducible asystole during endovascular treatment of a posterior fossa dural arteriovenous fistula. Catheterisation of the posterior meningeal artery, a branch of the vertebral artery in...

Dural Arteriovenous Fistula Manifested as Rapid Progressive Dementia Successfully Treated by Endovascular Embolization Only.

A 43-year-old male presented with daytime sleepiness at work and indifferent behavior like never before. Two weeks prior to hospital admission, he had episodic memory loss with well preserved remote memory. Brain MRI showed a dural arteriovenous fistula (DAVF) in the right lateral transverse sinus with a bilateral thalamic venous infarction. Cerebral angiography confirmed a right transverse sigmoid dural arteriovenous fistula with a feeding artery of the right occipital artery and left posterior meningeal artery. The DAVF was completely eliminated through multiple endovascular interventions. Recently, endovascular treatment has become one of the main therapeutic options to obliterate a fistulous site, which has led to a rapid diagnostic approach and management of DAVFs with high curative rates. We report a rare case of posterior fossa located at a dural arteriovenous fistula that caused rapid progressive dementia and was successfully eliminated through only endovascular treatment.

A Case of Lateral Medullary Artery Arisen from the Posterior Meningeal Artery

A Case of Lateral Medullary Artery Arisen from the Posterior Meningeal Artery