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https://www.readbyqxmd.com/read/28434858/stem-cell-intrinsic-seven-up-triggered-temporal-factor-gradients-diversify-intermediate-neural-progenitors
#1
Qingzhong Ren, Ching-Po Yang, Zhiyong Liu, Ken Sugino, Kent Mok, Yisheng He, Masayoshi Ito, Aljoscha Nern, Hideo Otsuna, Tzumin Lee
Building a sizable, complex brain requires both cellular expansion and diversification. One mechanism to achieve these goals is production of multiple transiently amplifying intermediate neural progenitors (INPs) from a single neural stem cell. Like mammalian neural stem cells, Drosophila type II neuroblasts utilize INPs to produce neurons and glia. Within a given lineage, the consecutively born INPs produce morphologically distinct progeny, presumably due to differential inheritance of temporal factors. To uncover the underlying temporal fating mechanisms, we profiled type II neuroblasts' transcriptome across time...
April 10, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28409217/-surgical-techniques-for-treatment-of-vestibular-schwannoma
#2
S Rosahl, D Eßer
BACKGROUND: Microsurgical resection of vestibular schwannomas is demanding, even if not all of these tumors represent a challenge for experienced surgeons. In order to make the right decisions when it comes to balancing the extent of tumor resection with preservation of function, the surgeon must possess detailed knowledge of the surgical techniques and also have mastered these. OBJECTIVE: The current article describes the state-of-the-art of the three major microsurgical techniques for resection of vestibular schwannomas, their pearls and their perils...
April 13, 2017: HNO
https://www.readbyqxmd.com/read/28304187/letter-to-the-editor-keyhole-and-standard-subtemporal-approaches
#3
Melissa M Stamates, Ricky H Wong
No abstract text is available yet for this article.
March 17, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28274264/a-unique-pattern-of-cortical-connectivity-characterizes-patients-with-attention-deficit-disorders-a-large-electroencephalographic-coherence-study
#4
Frank H Duffy, Aditi Shankardass, Gloria B McAnulty, Heidelise Als
BACKGROUND: Attentional disorders (ADD) feature decreased attention span, impulsivity, and over-activity interfering with successful lives. Childhood onset ADD frequently persists to adulthood. Etiology may be hereditary or disease associated. Prevalence is 5% but recognition may be 'overshadowed' by comorbidities (brain injury, mood disorder) thereby escaping formal recognition. Blinded diagnosis by MRI has failed. ADD may not itself manifest a single anatomical pattern of brain abnormality but may reflect multiple, unique responses to numerous and diverse etiologies...
March 9, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28223248/endoscopic-intradural-subtemporal-keyhole-approach-with-neuronavigational-assistance-to-the-suprasellar-petroclival-and-ventrolateral-brainstem-regions-an-anatomic-study
#5
Zhemin Ding, Qing Wang, Xiaojie Lu, Xinwei Qian
OBJECTIVE: The purposes of this study were to evaluate the feasibility of a purely endoscopic intradural approach to the suprasellar, petroclival and ventrolateral brainstem regions through a subtemporal keyhole and to assess the value of neuronavigational assistance in the Kawase approach. METHODS: Twenty endoscopic intradural subtemporal keyhole approaches were performed on 10 cadaveric heads. An intradural Kawase approach and a navigation-assisted intradural Kawase approach were then carried out on a random side of each specimen...
February 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28217394/technical-nuances-of-subtemporal-approach-for-the-treatment-of-basilar-tip-aneurysm
#6
Vladimir S Nakov, Toma Y Spiriev, Ivan T Todorov, Plamen Simeonov
BACKGROUND: Basilar tip aneurysms are one of the most complex vascular lesions to treat surgically because of their location, depth of the approach, and close proximity of vital neurovascular structures such as the mesencephalon, cranial nerves, perforating arteries to the thalamus. There are different surgical approaches utilized to reach basilar tip aneurysms, namely, pterional, pretemporal, orbitozygomatic, subtemporal, and anterior petrosectomy. Each of them has its advantages and limitations...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28168104/an-early-geikiid-dicynodont-from-the-tropidostoma-assemblage-zone-late-permian-of-south-africa
#7
Christian F Kammerer, Roger M H Smith
Based on specimens previously identified as Tropidostoma, a new taxon of dicynodont (Bulbasaurus phylloxyron gen. et sp. nov.) from the Karoo Basin of South Africa is described. Bulbasaurus is a medium-sized dicynodont (maximum dorsal skull length 16.0 cm) restricted to the Tropidostoma Assemblage Zone (early Lopingian) of the Beaufort Group. Bulbasaurus can be distinguished from Tropidostoma by an array of characters including the presence of a tall, sharp premaxillary ridge, large, rugose, nearly-confluent nasal bosses, a nasofrontal ridge, massive tusks, robust pterygoids, prominently twisted subtemporal bar, and absence of a distinct postfrontal...
2017: PeerJ
https://www.readbyqxmd.com/read/28120069/middle-temporal-gyrus-versus-inferior-temporal-gyrus-transcortical-approaches-to-high-grade-astrocytomas-in-the-mediobasal-temporal-lobe-a-comparison-of-outcomes-functional-restoration-and-surgical-considerations
#8
Alfredo Quinones-Hinojosa, Shaan M Raza, Ishrat Ahmed, Jordina Rincon-Torroella, Kaisorn Chaichana, Alessandro Olivi
INTRODUCTION: High-grade astrocytomas of the mesial temporal lobe may pose surgical challenges. Several approaches (trans-sylvian, subtemporal, and transcortical) have been designed to circumnavigate the critical neurovascular structures and white fiber tracts that surround this area. Considering the paucity of literature on the transcortical approach for these lesions, we describe our institutional experience with transcortical approaches to Grade III/IV astrocytomas in the mesial temporal lobe...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/27965072/rare-lesions-of-the-internal-auditory-canal
#9
Kentaro Watanabe, Mary In-Ping Huang Cobb, Ali R Zomorodi, Calhoun D Cunningham, Yoichi Nonaka, Shunsuke Satoh, Allan H Friedman, Takanori Fukushima
BACKGROUND: Approximately 95% of tumors occurring within the internal auditory canal (IAC) are vestibular schwannomas. Many undergo stereotactic radiation without definitive tissue diagnosis. Rare IAC tumors are not all radiosensitive and are poorly described. METHODS: Between 1992 and 2015, 289 consecutive patients with IAC lesions operated on were reviewed retrospectively. RESULTS: Fifteen patients (5.2%) (16 operations) had unusual histologic findings, including nonvestibular schwannomas (2 facial schwannomas, 2 cochlear schwannomas, 2 intermedius schwannomas), 3 meningiomas, 3 cavernous hemangiomas, a mucosa-associated lymphoid tissue lymphoma, an arachnoid cyst, and a lipochoristoma...
March 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27916722/unique-diagnostic-features-and-surgical-strategy-for-intracranial-carotid-sympathetic-plexus-schwannoma-case-report-and-literature-review
#10
Hajime Takase, Kohta Araki, Shunsuke Seki, Kana Takase, Hidetoshi Murata, Nobutaka Kawahara
BACKGROUND: Intracranial carotid sympathetic plexus schwannoma (CSPS) is extremely rare; thus differential diagnostic criteria, optimal surgical strategies, and even a precise definition are lacking. Here we describe a case of CSPS and propose a definition and classification for previously reported cases. CASE DESCRIPTION: A 54-year-old man presented with hypacusis and abducens nerve palsy. Radiologic examinations revealed a well-enhanced mass at the right medial temporal base with erosion of the petrous apex and intact perilesional cortical bone...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27913265/hearing-preservation-during-anterior-petrosectomy-the-cochlear-safety-line
#11
Xiaoming Guo, Halima Tabani, Dylan Griswold, Ali Tayebi Meybodi, Jose Juan Gonzalez Sanchez, Michael T Lawton, Arnau Benet
BACKGROUND: Identification and protection of the cochlea during anterior petrosectomy is key to prevent hearing loss. Currently, there is no optimal method to infer the position of the cochlea in relation to the Kawase quadrangle; therefore, damage to the cochlea during anterior petrosectomy remains a substantial risk. OBJECTIVES: To identify and define landmarks available during anterior petrosectomy to locate the cochlea and prevent its damage. METHODS: The Kawase approach was simulated in 11 cadaveric specimens...
March 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27861331/intraparenchymal-endodermal-cyst-with-spontaneous-intracystic-hemorrhage-in-the-temporal-lobe-of-an-adult
#12
REVIEW
Xin-Jie Bao, Xue-Yuan Li, Qi-Pu Wang, Xin-Yu Ren, Zhi-Yong Liang, Wen-Bin Ma, Ren-Zhi Wang, Jun-Ji Wei
BACKGROUND: Endodermal cysts (EC) are rare but well-known congenial lesions of the central nervous system mainly located in the spinal subdural space. Intracranial ECs are rare and commonly encountered in the posterior cranial fossa as extra-axial lesions; an intraparenchymal location is exceedingly rare. A complete removal is the best surgical strategy and any residue can cause recurrence. It is necessary to exclude EC in patients with intracranial cystic lesions. We present a case of intraparenchymal EC with spontaneous intracystic hemorrhage in the temporal lobe of an adult...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27696005/erratum-to-fourth-cranial-nerve-surgical-anatomy-in-the-subtemporal-transtentorial-approach-and-in-the-pretemporal-combined-inter-intradural-approach-through-the-fronto-temporo-orbito-zygomatic-craniotomy-a-cadaveric-study
#13
https://www.readbyqxmd.com/read/27647023/bypass-revascularization-applied-to-the-posterior-cerebral-artery
#14
Nakao Ota, Felix Goehre, Takanori Miyazaki, Yu Kinoshita, Hidetoshi Matsukawa, Takeshi Yanagisawa, Humihiro Sakakibara, Norihiro Saito, Shiro Miyata, Kosumo Noda, Toshiyuki Tsuboi, Hiroyasu Kamiyama, Sadahisa Tokuda, Kyousuke Kamada, Rokuya Tanikawa
BACKGROUND: The application of bypass procedures to the posterior cerebral artery (PCA) in combination with proximal clipping or trapping is a useful option for the treatment of complex posterior circulation aneurysms, especially those of the PCA. Due to its course around the midbrain through various cisterns, different approaches are required to access the PCA. OBJECTIVE: The presented study analyzes a retrospective case series of bypass procedures to the PCA to investigate the relevant treatment strategies and their outcomes...
September 16, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27636184/is-less-always-better-keyhole-and-standard-subtemporal-approaches-evaluation-of-temporal-lobe-retraction-and-surgical-volume-with-and-without-zygomatic-osteotomy-in-a-cadaveric-model
#15
Serdar Ercan, Alba Scerrati, Phengfei Wu, Jun Zhang, Mario Ammirati
OBJECTIVE The subtemporal approach is one of the surgical routes used to reach the interpeduncular fossa. Keyhole subtemporal approaches and zygomatic arch osteotomy have been proposed in an effort to decrease the amount of temporal lobe retraction. However, the effects of these modified subtemporal approaches on temporal lobe retraction have never been objectively validated. METHODS A keyhole and a classic subtemporal craniotomy were executed in 4 fresh-frozen silicone-injected cadaver heads. The target was defined as the area bordered by the superior cerebellar artery, the anterior clinoid process, supraclinoid internal carotid artery, and the posterior cerebral artery...
September 16, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27549625/fourth-cranial-nerve-surgical-anatomy-in-the-subtemporal-transtentorial-approach-and-in-the-pretemporal-combined-inter-intradural-approach-through-the-fronto-temporo-orbito-zygomatic-craniotomy-a-cadaveric-study
#16
L Pescatori, M Niutta, M P Tropeano, G Santoro, A Santoro
Despite the recent progress in surgical technology in the last decades, the surgical treatment of skull base lesions still remains a challenge. The purpose of this study was to assess the anatomy of the tentorial and cavernous segment of the fourth cranial nerve as it appears in two different surgical approaches to the skull base: subtemporal transtentorial approach and pretemporal fronto-orbito-zygomatic approach. Four human cadaveric fixed heads were used for the dissection. Using both sides of each cadaveric head, we made 16 dissections: 8 with subtemporal transtentorial technique and 8 with pretemporal fronto-orbito-zygomatic approach...
January 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/27538163/-microsurgical-management-of-petroclival-meningiomas-combined-trans-subtemporal-and-suboccipital-retrosigmoid-keyhole-approach
#17
L H Chen, Y Yang, Q Wei, Y J Li, W D Li, J B Gao, B Yu, H Zhao, R X Xu
OBJECTIVE: With the development of modern skull base minimally invasive technology mature and neural radio surgery techniques, it is necessary to re-examine the therapeutic strategy for the treatment of petroclival meningiomas. To sum up the operative experience and methods in microsurgical resection of petroclival meningiomas by the combining trans-subtemporal and suboccipital retrosigmoid keyhole approach. To explore the minimally invasive operation approach of petroclival meningiomas, to raise the removal degree and to improve the postoperative result using this approach...
February 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27373363/-the-application-and-mechanism-analysis-of-postoperative-intracranial-pressure-monitoring-in-giant-meningioma-clinical-analysis-of-7-cases
#18
G Chen, W W Zhai, Z Q Yu
OBJECTIVE: To investigate varying patterns of intracranial pressure(ICP)after giant meningioma resection and analyze the causes of the variation of ICP in different postoperative phases. METHODS: Clinical data, surgical approachs and the ICP monitoring data of 7 patients with giant meningioma in different positions who were admitted to the First Affiliated Hospital of Soochow University from October 2013 to July 2014 and received microsurgical resection via different approachs were analysed retrospectively...
June 28, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27175318/subtemporal-retrolabyrinthine-posterior-petrosal-versus-endoscopic-endonasal-approach-to-the-petroclival-region-an-anatomical-and-computed-tomography-study
#19
Eric Mason, Jason Van Rompaey, C Arturo Solares, Ramon Figueroa, Daniel Prevedello
Background The petroclival region seats many neoplasms. Traditional surgical corridors to the region can result in unacceptable patient morbidity. The combined subtemporal retrolabyrinthine transpetrosal (posterior petrosal) approach provides adequate exposure with hearing preservation; however, the facial nerve and labyrinth are put at risk. Approaching the petroclival region with an endoscopic endonasal approach (EEA) could minimize morbidity. Objective To provide an anatomical and computed tomography (CT) comparison between the posterior petrosal approach and EEA to the petroclival region...
June 2016: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/27161456/microsurgical-resection-of-petroclival-tumors-via-the-subtemporal-transtentorial-approach
#20
Zhou Xu, Xingruo Zeng, Daofeng Tian, Qianxue Chen
AIM: To study and summarize our experience with the subtemporal transtentorial approach for resection of petroclival tumors. MATERIAL AND METHODS: Twenty-eight patients who suffered from petroclival tumors and underwent tumor resection via a subtemporal transtentorial approach between October 2010 and July 2013 were retrospectively reviewed. RESULTS: Total resection was performed in 22 cases, at a rate of 78.57%, subtotal resection in 5 cases, and large portion resection in 1 case...
2016: Turkish Neurosurgery
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