scholarly journals Unruptured Saccular Aneurysm Arising from the Fenestrated A1 Segment of the Anterior Cerebral Artery: Report of 2 Cases

2018 ◽  
Vol 10 (2) ◽  
pp. 140-149 ◽  
Author(s):  
Naoya Iwabuchi ◽  
Atsushi Saito ◽  
Kentaro Fujimoto ◽  
Taigen Nakamura ◽  
Tatsuya Sasaki
Keyword(s):  
Cerebral Artery ◽  
Cerebral Angiography ◽  
Anterior Cerebral Artery ◽  
The Other ◽  
Saccular Aneurysm ◽  
Resonance Imaging ◽  
Surgical Clipping ◽  
Magnetic Resonance Imaging Mri ◽  
Aneurysmal Neck ◽  
Difficult Cases

Some cases of aneurysms originating from the fenestrated A1 segment of the anterior cerebral artery (ACA) have been reported, but the pitfalls of the surgical procedure have not been well determined. We herein report 2 cases of a saccular aneurysm arising from the fenestrated A1 segment. Case 1 was a 72-year-old man incidentally diagnosed with an unruptured left ACA aneurysm on magnetic resonance imaging (MRI). Cerebral angiography revealed a saccular aneurysm arising from the proximal end of the left A1 segment. He underwent surgical clipping via the left pterional approach. The aneurysm originated from the proximal bifurcation of the fenestrated left A1 segment. A fenestrated ring clip was applied to obliterate the aneurysmal neck and one small fenestrated trunk, preserving the other fenestrated trunk and perforators around the fenestration. Case 2 was a 73-year-old man incidentally diagnosed with an unruptured ACA aneurysm on MRI. Cerebral angiography revealed a saccular aneurysm arising from the proximal end of the fenestrated left A1 segment. He underwent surgical clipping via the interhemispheric approach. The aneurysm originated from the proximal bifurcation of the fenestrated left A1 segment. A fenestrated ring clip was applied to obliterate the aneurysmal neck and one hypoplastic fenestrated trunk, preserving the other fenestrated trunk and perforators around the aneurysm. Detailed intraoperative evaluations of the anatomical structure and hemodynamics around the fenestration are important. The intentional obliteration of a fenestrated trunk and application of fenestrated clips need to be considered in difficult cases in order to expose the aneurysmal neck.

scholarly journals Balloon-Assisted Cannulation for Difficult Anterior Cerebral Artery Access

2017 ◽  
Vol 7 (1-2) ◽  
pp. 48-52
Author(s):  
Varun Naragum ◽  
Mohamad AbdalKader ◽  
Thanh N. Nguyen ◽  
Alexander Norbash
Keyword(s):  
Cerebral Artery ◽  
Paradigm Shift ◽  
Intracranial Aneurysms ◽  
Anterior Cerebral Artery ◽  
Endovascular Coiling ◽  
Anterior Communicating Artery ◽  
Surgical Clipping ◽  
Ruptured Aneurysms ◽  
Common Location ◽  
Proximal Middle Cerebral Artery

The anterior communicating artery is a common location for intracranial aneurysms. Compared to surgical clipping, endovascular coiling has been shown to improve outcomes for patients with ruptured aneurysms and we have seen a paradigm shift favoring this technique for treating aneurysms. Access to the anterior cerebral artery can be challenging, especially in patients with tortuous anatomy or subarachnoid hemorrhage or in patients presenting with vasospasm. We present a technique for cannulating the anterior cerebral artery using a balloon inflated in the proximal middle cerebral artery as a rebound surface.

scholarly journals Saccular Aneurysm of the Azygos Anterior Cerebral Artery: Three Case Reports

2007 ◽  
Vol 42 (4) ◽  
pp. 342 ◽  
Author(s):  
Jun Suk Huh ◽  
Sang Keun Park ◽  
Jun Jae Shin ◽  
Tae Hong Kim
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Case Reports ◽  
Saccular Aneurysm

scholarly journals EEG Patterns in Patients with Prader-Willi Syndrome

2021 ◽  
Author(s):  
Maurizio Elia ◽  
Irene Rutigliano ◽  
Michele Sacco ◽  
Simona Madeo ◽  
Malgorzata Wasniewska ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Brain Magnetic Resonance Imaging ◽  
The Other ◽  
Prader Willi Syndrome ◽  
Resonance Imaging ◽  
Clinical Genetic ◽  
Behavioral Disturbances ◽  
Neuroimaging Data ◽  
Interictal Eeg ◽  
Magnetic Resonance Imaging Mri

Abstract Prader-Willi syndrome (PWS) is a rare disease determined by the loss of the paternal copy of the 15q11-q13 region, characterized by hypotonia, hyperphagia and obesity, short stature, hypogonadism, craniofacial dysmorphisms, cognitive and behavioral disturbances. The aims of this retrospective study were to analyze interictal EEG findings in a group of PWS patients and to correlate them with genetic, clinical and neuroimaging data. Demographic, clinical, genetic, EEG, and neuroimaging data about seventy-four patients were collected. Associations between the presence of EEG paroxysmal abnormalities, genotype, clinical and neuroimaging features were investigated. Four patients (5.4%) presented a drug-sensitive epilepsy. Interictal EEG paroxysmal abnormalities, focal or multifocal, were present in 25.7% of the cases, and normalization of EEG occurred in about 25% of the cases. In 63.2% of the cases paroxysmal abnormalities were localized over the middle-posterior regions bilaterally. Brain magnetic resonance imaging (MRI) was performed in 39 patients (abnormal in 59%). No relevant associations were found between EEG paroxysmal abnormalities and all the other variables considered. Interictal EEG paroxysmal abnormalities, in particular with a bilateral middle-posterior localization, could represent an important neurological feature of PWS not associated with genotype, cognitive or behavior endophenotypes, MRI anomalies, or prognosis.

scholarly journals The experience of simultaneous endovascular occlusion of arteriovenous malformation and saccular aneurism in a parturient woman

2020 ◽  
Vol 30 (4) ◽  
pp. 79-87
Author(s):  
D.V. Shchehlov ◽  
S.V. Konotopchyk ◽  
I.N. Bortnyk ◽  
O.E. Svyrydiuk ◽  
M.Yu. Mamonova
Keyword(s):  
Arteriovenous Malformation ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Parietal Lobe ◽  
Endovascular Embolization ◽  
Saccular Aneurysm ◽  
Anterior Communicating Artery ◽  
Parturient Woman ◽  
Left Lateral Ventricle ◽  
The Right

The clinical case of simultaneous endovascular bloodstream exclusion of arteriovenous malformation and saccular aneurysm in parturient woman is presented. Onyx liquid adhesive composition and monospiral aneurysm occlusion technique were used. Patient X., 31, was hospitalized to the clinic on the 10th day of the postpartum period. From the anamnesis: twice (at 20th and 27th weeks of pregnancy) patient suffered intraventricular hemorrhage due to the rupture of arteriovenous malformation in the posterior third of the corpus callosum, left lateral ventricle and left parietal lobe of the brain. After the first hemorrhage a conservative treatment tactic was determined, given the high risk of complications associated with the surgical intervention for the mother and fetus. After the second hemorrhage endovascular embolization of malformation was suggested, however, the patient and her husband refused surgery, preferring conservative therapy with subsequent surgical treatment after delivery. In addition to the malformation, according to the data of selective cerebral subtraction angiography multiple cerebral saccular aneurysms of the left Anterior Cerebral – Anterior Communicating Artery and 2 Anterior Cerebral Artery aneurysms (A2-A2, A3-A4-segments) on the right side were diagnosed. Endovascular subtotal embolization of arteriovenous malformation and occlusion of the right Anterior Cerebral Artery (A2-A3-segment) saccular aneurysm were performed during the operation. A control angiographic examination after 3 months showed a complete exclusion of these arteriovenous malformation and saccular aneurysm and disappearance of all aneurysms of the left Anterior Cerebral Artery – Anterior Communicating Artery and right Anterior Cerebral Artery (A3-A4-segment).

Clinical Management of Medial Patellar Plica Syndrome: Mini Review from Diagnosis to Treatment

2020 ◽  
Vol 16 (1) ◽  
pp. 9-11
Author(s):  
Hassan Zmerly ◽  
Ibrahim Akkawi ◽  
Roberto Citarella ◽  
Marwan E. Ghoch
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Presentation ◽  
Joint Line ◽  
The Other ◽  
Resonance Imaging ◽  
Plica Syndrome ◽  
Synovial Plicae ◽  
Magnetic Resonance Imaging Mri ◽  
Secondary Causes

: Synovial plicae are thickenings of the synovial knee membrane; they are very frequent and often asymptomatic. However, they can become symptomatic due to idiopathic or secondary causes, like trauma and inflammation of the synovial tissue. Currently, synovial plicae are classified as infrapatellar, mediopatellar and suprapatellar. The prevalence of the mediopatellar plica over the other forms of plicae varies between 18% and 60%. The most reported symptom of the mediopatellar plica is pain located medial to the patella above the joint line. Magnetic Resonance Imaging (MRI) is the most useful examination to highlight the presence of the plica, its measurement and exact location. The treatment is initially conservative, i.e. medical treatment and physiotherapy, however when these fail, the plica should be removed surgically via arthroscopy. : In the current paper, we aim to report our clinical experience in the management of medial patellar plica syndrome by describing the clinical presentation and diagnosis of this condition as well as its treatment.

Utilizing magnetic resonance imaging (MRI) to assess the effects of angling-induced barotrauma on rockfish (Sebastes)

2008 ◽  
Vol 65 (7) ◽  
pp. 1245-1249 ◽  
Author(s):  
Bonnie L. Rogers ◽  
Christopher G. Lowe ◽  
Esteban Fernández-Juricic ◽  
Lawrence R. Frank
Keyword(s):  
Magnetic Resonance Imaging ◽  
Image Segmentation ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
The Body ◽  
The Other ◽  
Bladder Rupture ◽  
Swim Bladder ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

The physical consequences of barotrauma on the economically important rockfish ( Sebastes ) were evaluated with a novel method using T2-weighted magnetic resonance imaging (MRI) in combination with image segmentation and analysis. For this pilot study, two fishes were captured on hook-and-line from 100 m, euthanized, and scanned in a 3 Tesla human MRI scanner. Analyses were made on each fish, one exhibiting swim bladder overinflation and exophthalmia and the other showing low to moderate swim bladder overinflation. Air space volumes in the body were quantified using image segmentation techniques that allow definition of individual anatomical regions in the three-dimensional MRIs. The individual exhibiting the most severe signs of barotrauma revealed the first observation of a gas-filled orbital space behind the eyes, which was not observable by gross dissection. Severe exophthalmia resulted in extreme stretching of the optic nerves, which was clearly validated with dissections and not seen in the other individual. Expanding gas from swim bladder overinflation must leak from the swim bladder, rupture the peritoneum, and enter the cranium. This MRI method of evaluating rockfish following rapid decompression is useful for quantifying the magnitude of internal barotrauma associated with decompression and complementing studies on the effects of capture and discard mortality of rockfishes.

Bilateral innervation of the cerebral arteries by the superior cervical ganglion in cats

1980 ◽  
Vol 53 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Jesús Marín ◽  
Mercedes Salaices ◽  
Fernando Rivilla ◽  
Javier Burgos ◽  
Emilio J. Marco
Keyword(s):  
Cerebral Artery ◽  
Superior Cervical Ganglion ◽  
Anterior Cerebral Artery ◽  
Contractile Response ◽  
Cerebral Arteries ◽  
The Other ◽  
Content Type ◽  
Cervical Ganglion ◽  
The Right ◽  
Fine Print

✓ The effect of removal of the left superior cervical ganglion on the contractile response to norepinephrine (NE) and 5-hydroxytryptamine (5-HT, serotonin) was studied in isolated segments of the middle cerebral artery (MCA) and posterior communicating artery (PCoA) of the cat. Fifteen days after the excision, each dose of NE elicited a potentiated response in both the MCA and the PCoA, whichever side they originated. By contrast, 5-HT induced enhanced vasoconstriction at each dose only in the MCA and PCoA from the left side. When segments of MCA and PCoA from the right side were challenged against 5-HT, a significantly increased response was found only at the first three doses. On the other hand, the NE content of pools made of MCA, PCoA, and anterior cerebral artery from each side was reduced to the same level on both sides after ganglion removal. These results indicate that the excised superior cervical ganglion innervated the MCA and PCoA from both sides of the circle of Willis.

Surgically verified variations in the A1 segment of the anterior cerebral artery

1991 ◽  
Vol 75 (6) ◽  
pp. 950-953 ◽  
Author(s):  
Johannes Mäurer ◽  
Elisabeth Mäurer ◽  
Axel Perneczky
Keyword(s):  
Optic Nerve ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Optic Tract ◽  
The Other ◽  
Content Type ◽  
Fine Print

✓ Two patients with rare variations of the A1 segment of the anterior cerebral artery are presented. One patient had a perforation of the optic tract by an abnormal course of the A1 segment, and the other harbored an aneurysm of the A1 segment running below the optic nerve. The authors present a summary of A1 segment variations described in the literature.

Nonoverlapping Y-Configuration Stenting Technique With Dual Closed-Cell Stents in Wide-Neck Basilar Tip Aneurysms

2011 ◽  
Vol 70 (suppl_2) ◽  
pp. ons244-ons249 ◽  
Author(s):  
Young Dae Cho ◽  
Sun-Won Park ◽  
Jong Young Lee ◽  
Jung Hwa Seo ◽  
Hyun-Seung Kang ◽  
...  
Keyword(s):  
Cerebral Artery ◽  
Coil Embolization ◽  
Intracranial Aneurysms ◽  
Posterior Cerebral Artery ◽  
Good Alternative ◽  
The Other ◽  
Parent Artery ◽  
Closed Cell ◽  
Aneurysmal Neck ◽  
Wide Neck

ABSTRACT BACKGROUND: Stent-assisted coiling is increasingly used to treat wide-neck intracranial aneurysms to protect the lumen of the parent artery from coil protrusion. This technique is insufficient for treating some aneurysms, depending on their configurations. OBJECTIVE: To describe a variant of the Y-configuration stent-assisted coiling technique for the treatment of basilar tip aneurysms with wide necks. METHODS: This technique, called the nonoverlapping Y stenting technique, consists of the deployment of a closed-cell self-expandable stent from the basilar trunk to a posterior cerebral artery and then placement of a second stent from the basilar bifurcation to the other posterior cerebral artery without overlapping the first stent. The proximal flared portion of the second stent was located at the neck of the aneurysm. Coil embolization was performed under dual-stent protection. RESULTS: We successfully filled wide-neck aneurysms with coils under stent protection by forming a bridge across the aneurysmal neck without overlapping 2 closed-cell stents. Six basilar tip aneurysms were successfully treated with this technique. CONCLUSION: The nonoverlapping Y stenting technique is a good alternative to traditional stent-assisted coiling. This technique is particularly suitable for the treatment of broad-neck bifurcation aneurysms.

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