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https://www.readbyqxmd.com/read/29243332/extrinsic-and-intrinsic-blood-supply-to-the-optic-chiasm
#1
Céline Salaud, Stéphane Ploteau, Pauline Blery, Paul Pilet, Olivier Armstrong, Antoine Hamel
INTRODUCTION: Although there have been many studies of the arterial cerebral blood supply, only seven have described the optic chiasm (OC) blood supply and their results are contradictory. The aim of this study was to analyze the extrinsic and intrinsic OC blood supply on cadaveric specimens using dissections and microcomputer tomography (Micro-CT). MATERIALS AND METHODS: Thirteen human specimens were dissected and the internal or common carotid arteries were injected with red latex, China Ink with gelatin or barium sulfate...
December 15, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29236191/engineering-genome-reduced-bacillus-subtilis-for-acetoin-production-from-xylose
#2
Panpan Yan, Yuanqing Wu, Li Yang, Zhiwen Wang, Tao Chen
OBJECTIVES: To investigate the capacity of a genome-reduced Bacillus subtilis strain as chassis cell for acetoin production from xylose. RESULTS: To endow the genome-reduced Bacillus subtilis strain BSK814 with the ability to utilize xylose, we inserted a native xyl operon into its genome and deleted the araR gene. The resulting strain BSK814A2 produced 2.94 g acetoin/l from 10 g xylose/l, which was 39% higher than control strain BSK19A2. The deletion of the bdhA and acoA genes further improved xylose utilization efficiency and increased acetoin production to 3...
December 13, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/29181806/-coil-mainly-policy-in-management-of-intracranial-acoa-aneurysms-single-centre-experience-with-the-systematic-review-of-literature-and-meta-analysis
#3
Anna Steklacova, Ondrej Bradac, Patricia de Lacy, Jiri Lacman, Frantisek Charvat, Vladimir Benes
Endovascular techniques are still expanding in their capability by introducing novel technologies. Nevertheless, anterior communicating artery (ACoA) remains the region with high propensity for aneurysm (AN) re-growth after endovascular intervention. The purpose of this study is to highlight the ongoing importance for microsurgical treatment. The authors conducted a single-institution retrospective study of ACoA AN treatment between January 2000 and December 2016 maintaining "coil mainly" policy. The results are supplied with a systematic review of the literature...
November 28, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/29170982/subcallosal-and-heubner-artery-infarcts-following-surgical-repair-of-an-anterior-communicating-artery-aneurysm-a-causal-relationship-with-postoperative-amnesia-and-long-term-outcome
#4
Shunji Mugikura, Hirokazu Kikuchi, Miki Fujimura, Etsuro Mori, Shoki Takahashi, Kei Takase
Since the 1950s, amnesia or memory impairment has been repeatedly reported in patients following surgical repair of anterior communicating artery (ACoA) aneurysms. Postoperative infarctions following surgical repair of ACoA aneurysms are classified as involvement of the subcallosal artery (the largest unpaired perforator of the ACoA), the recurrent artery of Heubner (RAH), or a combination of both. Postoperative amnesia can seriously affect the patient's quality of life, thus prompting physicians to discuss the symptomatology of the three infarction patterns...
November 23, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29152467/an-unruptured-anterior-communicating-artery-aneurysm-presenting-with-left-homonymous-hemianopsia-a-case-report
#5
Jae Wook Kim, Taek Kyun Nam, Ki Su Park, Yong Sook Park, Jeong Taik Kwon
Unruptured cerebral aneurysms sometimes present with visual symptomsdue to compression of the visual pathways. However, until now, unruptured anterior communicating artery (ACoA) aneurysms presenting visual field defects have been extremely rare. The authors report the case of a 51-year-old woman who presented with left homonymous hemianopsia. Radiological findings demonstrated an ACoA aneurysm filled with thrombus, that was compressing the optic chiasm and post-chiasmal tract. The patient underwent clipping of the aneurysm, which resolved the visual field defect...
June 2017: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/29114317/agenesis-of-the-internal-carotid-artery-with-transcavernous-anastomosis-associated-with-anterior-communicating-artery-aneurysms
#6
Kosuke Kumagai, Satoru Takeuchi, Naoki Otani, Masaki Komiyama, Kentaro Mori
Agenesis of the internal carotid artery (ICA) is a rare congenital anomaly. Recently, several cases of ICA agenesis have been associated with cerebral aneurysms. We present the seventh case of ICA agenesis with transcavernous anastomosis associated with cerebral aneurysms. A 47-year-old man presented with transient numbness of his left hand. Magnetic resonance angiography indicated the presence of anterior communicating artery (ACoA) aneurysms. Digital subtraction angiography revealed two ACoA aneurysms, absence of the left ICA, and an anomalous collateral vessel connecting the cavernous portions of both internal carotid arteries, which was considered to be a transcavernous anastomosis...
October 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29110606/the-fate-of-in-situ-lens-regeneration-is-determined-by-capsulorhexis-size
#7
X Tan, Z Liu, Y Zhu, C Chen, S Huang, B Chen, Z Lin, J Chen, X Tang, B Qu, X Liu, L Luo, J Deng, F Shang, M Wu, W Chen, H Lin, Y Liu
BACKGROUND AND OBJECTIVE: Lens regeneration is an optimal strategy for cataract patients to regain visual acuity with accommodation. We recently designed a novel, minimally invasive capsulorhexis surgical method for cataract removal that achieved functional lens regeneration in human infants. However, small anterior capsulorhexis requires advanced surgical expertise. To know whether the quality of the regenerated lens can be maintained with enlarged anterior capsulorhexis, we investigated the shape and transparency of the regenerated lenses with different anterior capsulorhexis diameters (ACDs)...
November 5, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/29107166/a-critical-analysis-of-the-utility-of-intra-operative-angiography
#8
William J Ares, Cynthia L Kenmuir, David M Panczykowski, Gregory M Weiner, Ashu P Jadhav, Tudor G Jovin, Bradley A Gross, Brian T Jankowitz
OBJECTIVE: Intraoperative digital subtraction angiography (ioDSA) is touted as the "gold standard" imaging evaluation for aneurysm clip constructs. Candid evaluations of its limitations are sparse. METHODS: A prospectively collected hospital billing database was queried to identify craniotomies for aneurysm clipping from January 2010 to December 2013. We evaluated the rate of occult residual and parent vessel stenosis determined on follow-up angiography for patients undergoing ioDSA and those not undergoing ioDSA...
October 26, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29104678/influence-of-gender-and-age-on-average-dimensions-of-arteries-forming-the-circle-of-willis-study-by-magnetic-resonance-angiography-on-kosovo-s-population
#9
Jeton Shatri, Dorentina Bexheti, Sadi Bexheti, Serbeze Kabashi, Shaip Krasniqi, Ilir Ahmetgjekaj, Valbona Zhjeqi
BACKGROUND: Circulus arteriosus cerebri is the main source of blood supply to the brain; it connects the left and right hemispheres with anterior and posterior parts. Located at the interpenducular fossa at the base of the brain the circle of Willis is the most important source of collateral circulation in the presence of the disease in the carotid or vertebral artery. AIM: The purpose of the research is to study the diameter and length of arteries and provide an important source of reference on Kosovo's population...
October 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28978900/subarachnoid-aneurysmal-hemorrhage-associated-with-coarctation-of-the-aorta-case-report-and-review-of-the-literature
#10
Ryuta Nakae, Yu Fujiki, Shoji Yokobori, Yasutaka Naoe, Hiroyuki Yokota
Intracranial aneurysms (IAs) that undergo rupture causing subarachnoid hemorrhage (SAH), are common in young patients with coarctation of the aorta (CoA), but rarer in middle-aged and elderly patients. The pathogenesis of IAs associated with CoA remains unclear. We report the case of a 50-year-old woman who presented with SAH. On evaluation, six IAs were distributed among the anterior communicating artery (ACoA) (ruptured), distal segments of both anterior cerebral arteries (ACA), the left internal carotid artery (ICA), the bifurcation of the left middle cerebral artery (MCA)/MCA early branch, and the inferior trunk of the left MCA...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28965667/clinical-outcomes-of-multiple-aneurysms-microsurgical-clipping-evaluation-of-90-patients
#11
Murad Asiltürk, Anas Abdallah
BACKGROUND: The incidence of multiple intracranial aneurysms (MIAs) among patients who are diagnosed with aneurysm is 15-45% in the literature. Treatment options depend on the patient's status, age, aneurysm location and neurosurgeon's experience. In this study outcomes of micro-surgically clipped 90 patients have been evaluated. MATERIALS AND METHODS: Medical records of 90 (49 women and 41 men) patients of MIAs who underwent surgery by the authors, during a 3-year period from 2011 to 2013 were retrospectively reviewed of prospectively collected patients' data...
September 23, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28939188/neural-and-psychological-characteristics-of-college-students-with-alcoholic-parents-differ-depending-on-current-alcohol-use
#12
Kathleen A Brown-Rice, Jamie L Scholl, Kelene A Fercho, Kami Pearson, Noah A Kallsen, Gareth E Davies, Erik A Ehli, Seth Olson, Amy Schweinle, Lee A Baugh, Gina L Forster
A significant proportion of college students are adult children of an alcoholic parent (ACoA), which can confer greater risk of depression, poor self-esteem, alcohol and drug problems, and greater levels of college attrition. However, some ACoA are resilient to these negative outcomes. The goal of this study was to better understand the psychobiological factors that distinguish resilient and vulnerable college-aged ACoAs. To do so, scholastic performance and psychological health were measured in ACoA college students not engaged in hazardous alcohol use (resilient) and those currently engaged in hazardous alcohol use (vulnerable)...
February 2, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28920549/rupture-of-a-non-traumatic-anterior-communicating-artery-aneurysm-does-location-of-aneurysm-associate-with-functional-independence-following-post-acute-in-patient-neurorehabilitation
#13
Henriette Holm Stabel, Asger Roer Pedersen, Søren Paaske Johnsen, Jørgen Feldbæk Nielsen
OBJECTIVE: Patients with non-traumatic rupture of an aneurysm located at the anterior communicating artery (ACoA) often experience cognitive disabilities. It is unknown whether location of aneurysm also affects the possibility for improvement in functional independence compared to patients with an aneurysmal subarachnoid hemorrhage (a-SAH) located elsewhere. The aim was to explore the association between location of aneurysm (ACoA versus other) and level of functional independence, measured by Functional Independence Measure (FIM), at discharge from rehabilitation...
September 18, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28906352/clinical-and-angiographic-outcomes-following-endovascular-treatment-of-very-small-3%C3%A2-mm-or-smaller-intracranial-aneurysm-a-single-center-experience
#14
Yongsheng Liu, Feng Wang, Xiaochen Fu, Yongjian Liu, Guodong Zhang, Ke Xu
Treatments for very small (3 mm or smaller) intracranial aneurysms (VSAs) remain controversial. The aim of this study was to evaluate the efficacy of endovascular treatment for VSAs and to evaluate clinical risk factors associated with complications.This retrospective study enrolled 82 VSA patients who underwent coil embolization in our institution. Angiographic outcomes were assessed according to the Meyers classification. The clinical results were evaluated using the modified Rankin scale (mRS) immediately after coiling, at discharge, and during follow-up...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28843755/association-of-perforator-infarction-with-clinical-courses-and-outcomes-following-surgical-clipping-of-ruptured-anterior-communicating-artery-aneurysms
#15
Yu Yamamoto, Hitoshi Fukuda, Daisuke Yamada, Yoshitaka Kurosaki, Akira Handa, Benjamin Lo, Sen Yamagata
BACKGROUND: Perforator infarction is a procedure-related complication of surgical clipping of ruptured anterior communicating artery (ACoA) aneurysms. Patients with perforator infarction may present with specific clinical features. The aim of this study was to elucidate incidence, risk factors, clinical course, and outcomes of perforator infarction following surgical clipping of ruptured ACoA aneurysms. METHODS: Retrospective analysis was performed of 104 patients from a single-center, observational cohort database who underwent surgical clipping for ruptured ACoA aneurysm...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28841123/optic-neuropathy-after-anterior-communicating-artery-aneurysm-clipping-3-cases-and-techniques-to-address-a-correctable-pitfall
#16
Joseph R Linzey, Kevin S Chen, Luis Savastano, B Gregory Thompson, Aditya S Pandey
Brain shifts following microsurgical clip ligation of anterior communicating artery (ACoA) aneurysms can lead to mechanical compression of the optic nerve by the clip. Recognition of this condition and early repositioning of clips can lead to reversal of vision loss. The authors identified 3 patients with an afferent pupillary defect following microsurgical clipping of ACoA aneurysms. Different treatment options were used for each patient. All patients underwent reexploration, and the aneurysm clips were repositioned to prevent clip-related compression of the optic nerve...
August 25, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28799871/letter-to-the-editor-clipping-after-pipeline-embolization-device-placement-for-a-thrombosed-acoa-aneurysm
#17
Mattia Pacetti, Pascal J Mosimann, Jean-Baptiste Zerlauth, Francesco Puccinelli, Marc Levivier, Roy Thomas Daniel
No abstract text is available yet for this article.
October 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28765030/relationship-of-a1-segment-hypoplasia-with-the-radiologic-and-clinical-outcomes-of-surgical-clipping-of-anterior-communicating-artery-aneurysms
#18
Fan Yang, Hao Li, Jun Wu, Maogui Li, Xin Chen, Pengjun Jiang, Zhengsong Li, Yong Cao, Shuo Wang
OBJECTIVE: This study aims to assess whether the A1 segment hypoplasia is a risk factor for unfavorable radiologic and clinical outcomes of surgical clipping anterior communicating artery (ACoA) aneurysm. METHODS: We retrospectively reviewed 251 patients with ACoA aneurysm who underwent surgical clipping in Beijing Tiantan Hospital between September 2011 and September 2016. Their clinical and radiologic features, as well as clinical outcomes, were reviewed. In addition, univariate and multivariate logistic regression analysis was performed to identify independent risk factors for the postoperative infarction and unfavorable clinical outcomes of surgical clipping ACoA aneurysm...
October 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28716568/factors-associated-with-rerupture-of-intracranial-aneurysms-after-endovascular-treatment-a-retrospective-review-of-11years-experience-at-a-single-institution-and-review-of-the-literature
#19
REVIEW
A C White, C D Roark, D E Case, D A Kumpe, J Seinfeld
Aneurysm rebleeding following initial endovascular management is uncommon, and the factors associated with its occurrence are poorly defined. We retrospectively analyzed a consecutive series of patients presenting with aneurysmal subarachnoid hemorrhage who underwent endovascular management to determine factors associated with rebleeding. Rebleeding occurred in 7/183 (3.8%) patients, 6 of which had an adjacent hematoma on initial neuroimaging. Aneurysms were located on the ACoA (n=5), PCoA (n=1), and MCA (n=1)...
October 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28689391/the-incidence-and-characteristics-of-patients-with-small-ruptured-aneurysms-5-mm-in-subarachnoid-hemorrhage
#20
Joon-Ho Choi, Hyun-Seok Park
OBJECTIVE: Small unruptured aneurysms (<5 mm) are known for their very low risk of rupture, and are recommended to be treated conservatively. However, we encounter many patients with small ruptured aneurysms in the clinical practice. We aimed to investigate the incidence and characteristics of patients with small ruptured aneurysms. METHODS: We reviewed all patients admitted to our hospital with subarachnoid hemorrhage from January 2005 to December 2015. The patients were divided into two groups: those with aneurysms <5 mm (group S) and those with aneurysms ≥5 mm (group L)...
July 2017: Journal of Korean Neurosurgical Society
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