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Posterior Skull Base

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https://www.readbyqxmd.com/read/29166425/anatomy-of-the-sphenopalatine-artery-and-its-implications-for-transnasal-neurosurgery
#1
M Eordogh, A Grimm, I Gawish, L Patonay, R Reisch, H R Briner, G Baksa
BACKGROUND: The knowledge of sinonasal vasculature is inevitable in transnasal neurosurgery. We performed an anatomical study on the sphenopalatine artery from the perspective of skull base procedures. METHODOLOGY: To analyse the anatomical landmarks of the sphenopalatine artery, arterial skull corrosion casts (26 head halves) underwent endoscopic transnasal phantom surgery. Furthermore, we performed microsurgical dissection on formaldehyde-fixated cadavers with arterial perfusion (14 head halves) as well as studied Cone Beam CT-scans of anonymised patients and cadavers (115 head sides)...
November 22, 2017: Rhinology
https://www.readbyqxmd.com/read/29160345/influence-of-the-cranial-base-flexion-on-class-i-ii-and-iii-malocclusions-a-systematic-review
#2
Kélei Cristina Mathias de Almeida, Taísa Boamorte Raveli, Camila Ivini Viana Vieira, Ary Dos Santos-Pinto, Dirceu Barnabé Raveli
OBJECTIVE: The aim of this study was to perform a systematic review on the morphological characteristics of the skull base (flexion, anterior length and posterior length) and the concomitant development of malocclusions, by comparing differences in dimorphism, ethnicity and age. METHODS: The articles were selected by means of electronic search on BBO, MEDLINE and LILACS databases from 1966 to 2016. A qualitative evaluation of the methodologies used on the articles was also performed...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29134168/anatomical-region-segmentation-for-objective-surgical-skill-assessment-with-operating-room-motion-data
#3
Yangming Li, Randall A Bly, R Alex Harbison, Ian M Humphreys, Mark E Whipple, Blake Hannaford, Kris S Moe
Background  Most existing objective surgical motion analysis schemes are limited to structured surgical tasks or recognition of motion patterns for certain categories of surgeries. Analyzing instrument motion data with respect to anatomical structures can break the limit, and an anatomical region segmentation algorithm is required for the analysis. Methods  An atlas was generated by manually segmenting the skull base into nine regions, including left/right anterior/posterior ethmoid sinuses, frontal sinus, left and right maxillary sinuses, nasal airway, and sphenoid sinus...
December 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29124088/considerations-and-code-for-partial-volume-correcting-18-f-av-1451-tau-pet-data
#4
Suzanne L Baker, Anne Maass, William J Jagust
[(18)F]-AV-1451 is a leading tracer used with positron emission tomography (PET) to quantify tau pathology. However, [(18)F]-AV-1451 shows "off target" or non-specific binding, which we define as binding of the tracer in unexpected areas unlikely to harbor aggregated tau based on autopsy literature [1]. Along with caudate, putamen, pallidum and thalamus non-specific binding [2], [3], we have found binding in the superior portion of the cerebellar gray matter, leading us to use inferior cerebellar gray as the reference region...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29094072/endoscopic-unilateral-transethmoid-paraseptal-approach-to-the-central-skull-base
#5
Márton Eördögh, Hans Rudolf Briner, Daniel Simmen, Nicholas Jones, Robert Reisch
Objectives: The endoscopic technique in transnasal skull base surgery offers optimal visualization and free manipulation in the surgical field. However, it may cause approach-related sinonasal injury, influencing patients' quality of life (QOL). To minimize rhinological morbidity without restrictions in surgical manipulation and tumor resection, we introduced the unilateral transethmoidal-paraseptal approach. In this article, we analyzed the long-term results and sinonasal outcome of this technique...
October 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/29072661/-the-application-of-the-computer-technologies-for-the-mathematical-simulation-of-the-ethmoidal-labyrinth
#6
M V Markeeva, O V Mareev, V N Nikolenko, G O Mareev, T V Danilova, E A Fadeeva, R V Fedorov
The objective of the present work was to study the relationship between the dimensions of the ethmoidal labyrinth and the skull in the subjects differing in the nose shape by means of the factorial and correlation analysis with the application of the modern computer-assisted methods for the three-dimensional reconstruction of the skull. We developed an original method for computed craniometry with the use the original program that made it possible to determine the standard intravital craniometrics characteristics of the human skull with a high degree of accuracy based on the results of analysis of 200 computed tomograms of the head...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/29065093/cochlear-implantation-in-cochlear-ossification-retrospective-review-of-etiologies-surgical-considerations-and-auditory-outcomes
#7
Ashish Vashishth, Andrea Fulcheri, Sampath Chandra Prasad, Margherita Bassi, Gianluca Rossi, Antonio Caruso, Mario Sanna
OBJECTIVES: 1) To review the surgical and auditory outcomes and complications of cochlear implantation in cases with cochlear ossification. 2) To evaluate association between the extent and etiology of ossification to outcomes. STUDY DESIGN: Retrospective study. SETTING: Otology and skull base surgery center. SUBJECTS AND METHODS: Charts of 40 patients (42 ears) with cochlear ossification undergoing cochlear implantation were reviewed...
October 23, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29057351/versatility-of-sub-occipital-approach-for-foramen-magnum-meningiomas-a-single-centre-experience
#8
Antonio Bocchetti, Valentina Cioffi, Cristian Gragnaniello, Raffaele de Falco
BACKGROUND: Foramen magnum meningiomas (FMM) represent a challenge for neurosurgeons. Multiple surgical strategies have been reported to treat these lesions in their variable location. Contemporary technical innovations allow the utilization of common sub-occipital craniotomy to treat ventrally, ventro-laterally and dorsally located FMMs. We present our technique and experience. METHODS: From November 2004 to November 2015, we treated 14 patients with FMM at the Department of Neurosurgery of the Santa Maria delle Grazie Hospital in Pozzuoli, Naples, Italy...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29024761/pattern-of-closure-of-skull-base-synchondroses-in-crouzon-syndrome
#9
Guillaume Coll, Laurent Sakka, Céline Botella, Nathalie Pham-Dang, Corine Collet, Michel Zerah, Eric Arnaud, Federico Di Rocco
BACKGROUND: The age of closure of skull base synchondroses has never been analyzed in a homogenous population of children with Crouzon syndrome. METHOD: A retrospective case-control study was performed on 30 Crouzon children (17M, 13F) aged 1 month to 12.48 years with Fibroblast Growth Factor Receptor type 2 mutation. Eleven synchondroses were analyzed on millimetric computed tomodensitometry slices before surgery. Syndromic patients were compared to a series of 235 healthy children previously published...
October 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28990662/the-radioanatomy-of-endonasal-flap-coverage-of-skull-base-defects-a-tool-for-preoperative-planning
#10
Francisco J D MacArthur, Gerald W McGarry
OBJECTIVES/HYPOTHESIS: To develop a tool for the calculation of surgical skull base defects and endonasal flap dimensions on preoperative computed tomography (CT) to aid surgical planning. STUDY DESIGN: Case series. METHODS: A literature search was conducted to identify all endonasal flaps. There were five basic models identified. These are the nasoseptal flap, anterior lateral nasal wall flap, bipedicled anterior septal flap, posterior pedicled inferior turbinate flap, and middle turbinate flap...
October 9, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28986226/internal-carotid-artery-and-its-relationship-with-structures-in-sellar-region-anatomy-study-and-its-clinical-applications
#11
Yishui Zhang, Wen Yang
BACKGROUND: Complications of the ICA in surgeries are rare but severe. This study aims to locate the ICA with 5 stationary bony structures in the sellar region: the anterior clinoid process (ACP), the tuberculum sellae, the bottom of the hypophyseal fossa, the posterior edge of the hypophyseal fossa and the post clinoid process and do measurements to determine their anatomic relationship with the ICA. METHODS: After multiple planar reconstructions on computer tomographic angiography images of 120 ICA in 60 individuals, we defined the 5 bony structures as 5 origins in horizontal, sagittal and vertical planes with the 3D coordinate system and got the cross-sections of bilateral ICA on the coronal plane passing through each origin...
October 3, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28978266/parapharyngeal-space-tumor-surgery-using-a-modified-cervical-parotid-approach
#12
Isaku Okamoto, Kiyoaki Tsukahara, Hiroki Sato
OBJECTIVES: The cervical approach to parapharyngeal space tumors is blind in cases involving an approach to the vicinity of the skull base from below. We therefore devised a procedure to improve the safety of surgery in the vicinity of the skull base. METHODS: With this surgical technique, the temporal branch from the main trunk is first identified, as in the case of parotid gland tumor surgery. We then approach the skull base by entering the posterior aspect of the parotid gland tissue from above the temporal branch and anterior auricular space, allowing clear visual confirmation of the upper part of the tumor...
October 5, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28973649/dural-closure-in-confined-spaces-of-the-skull-base-with-nonpenetrating-titanium-clips
#13
Chad A Glenn, Cordell M Baker, Joshua D Burks, Andrew K Conner, Adam D Smitherman, Michael E Sughrue
BACKGROUND: Dural repair in areas with limited operative maneuverability has long been a challenge in skull base surgery. Without adequate dural closure, postoperative complications, including cerebrospinal fluid (CSF) leak and infection, can occur. METHODS: We reviewed 53 consecutive surgical patients in whom a dural repair technique utilizing titanium microclips was performed from 2013 to 2016 at our institution. The repairs primarily involved difficult-to-reach dural defects in which primary suturing was difficult or impractical...
July 25, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28967314/endoscopic-endonasal-pituitary-gland-hemi-transposition-for-resection-of-a-dorsum-sellae-meningioma
#14
Alaa S Montaser, Juan M Revuelta Barbero, Alexandre Todeschini, André Beer-Furlan, Russell R Lonser, Ricardo L Carrau, Daniel M Prevedello
A 69-year-old female with incidental diagnosis of a dorsum sellae meningioma had shown significant tumor growth after initial conservative management. The procedure started with a microscopic sublabial transsphenoidal approach to the sella and the suprasellar space. Due to limitations to a safe dissection and removal of the retrosellar component, the surgery was converted to a purely endoscopic endonasal approach with left hemi-transposition of the pituitary gland, followed by drilling of the dorsum sellae and removal of the left posterior clinoid process...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28962950/transoral-decompression-and-stabilization-of-the-upper-cervical-segments-of-the-spine-using-custom-made-implants-in-various-pathologic-conditions-of-the-craniovertebral-junction
#15
Alexey N Shkarubo, Alexander A Kuleshov, Ilia V Chernov, Marchel S Vetrile, Igor N Lisyansky, Sergey N Makarov, George P Ponomarenko, Michael Spyrou
BACKGROUND: Surgical treatment of patients with atlantoaxial instability caused by pathologic changes of the skull base and craniovertebral junction combined with anterior compression of the brain stem is still associated with substantial technical difficulties and remains a matter of debate. Currently, anterior stabilization of the atlantoaxial junction is a promising approach that allows for the resection of the pathologic lesion of the skull base and craniovertebral junction with subsequent stabilization of C1-C2 or C1-C3 in 1 stage...
September 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28950429/the-role-of-ellis-van-creveld-2-evc2-in-mice-during-cranial-bone-development
#16
Edwin K Kwon, Ke'ale Louie, Anshul Kulkarni, Marilia Yatabe, Antonio Carlos de Oliveira Ruellas, Taylor N Snider, Yoshiyuki Mochida, Lucia H S Cevidanes, Yuji Mishina, Honghao Zhang
EvC syndrome is a type of autosomal-recessive chondrodysplasia. Previous case studies in patients suggest abnormal craniofacial development, in addition to dwarfism and tooth abnormalities. To investigate how craniofacial development is affected in EvC patients, surface models were generated from micro-CT scans of control mice, Evc2 global mutant mice and Evc2 neural crest-specific mutant mice. The anatomic landmarks were placed on the surface model to assess the morphological abnormalities in the Evc2 mutants...
September 26, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28927224/supraorbital-keyhole-craniotomy-for-basilar-artery-aneurysms-accounting-for-the-cliff-effect
#17
Melissa M Stamates, Andrew K Wong, Anita Bhansali, Ricky H Wong
BACKGROUND: Treatment of basilar artery aneurysms is challenging. While endovascular techniques have dominated, there still remain circumstances where open surgical clipping is required or preferred. Minimally invasive "keyhole" approaches are being used more frequently to provide the durability of surgical clipping with a lower morbidity profile; however, careful patient selection is required. The supraorbital "keyhole" approach has been described for the treatment of basilar artery aneurysms, but careful assessment of the basilar exposure is necessary to ensure proper visualization of the aneurysm and ability to obtain proximal vascular control...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28914866/-extended-endoscopic-endonasal-posterior-transclival-approach-to-tumors-of-the-clival-region-and-ventral-posterior-cranial-fossa-part-1-topographic-and-anatomical-features-of-the-clivus-and-adjacent-structures
#18
A N Shkarubo, K V Koval', G F Dobrovol'skiy, M A Shkarubo, V V Karnaukhov, B A Kadashev, D N Andreev, I V Chernov, O A Gadzhieva, O Yu Aleshkina, E A Anisimova, P L Kalinin, M A Kutin, D V Fomichev, O I Sharipov, D B Ismailov, E S Selivanov
OBJECTIVE: to describe the main topographic and anatomical features of the clival region and its adjacent structures for improvement and optimization of the extended endoscopic endonasal posterior (transclival) approach for resection of tumors of the clival region and ventral posterior cranial fossa. MATERIAL AND METHODS: We performed a craniometric study of 125 human skulls and a topographic anatomical study of heads of 25 cadavers, the arterial and venous bed of which was stained with colored silicone (the staining technique was developed by the authors) to visualize bed features and individual variability...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28902803/cochlear-implantation-in-otosclerosis-surgical-and-auditory-outcomes-with-a-brief-on-facial-nerve-stimulation
#19
Ashish Vashishth, Andrea Fulcheri, Gianluca Rossi, Sampath Chandra Prasad, Antonio Caruso, Mario Sanna
OBJECTIVES: 1) To review the surgical and auditory outcomes in patients of cochlear implantation in otosclerosis. 2) To review complications and postimplantation facial nerve stimulation (FNS). 3) To compare the auditory outcomes between patients displaying cochlear ossification to the nonossified ones. STUDY DESIGN: Retrospective study. SETTING: Quaternary Otology and Skull base surgery center. SUBJECTS AND METHODS: Charts of 36 patients (38 ears) with otosclerosis undergoing cochlear implantation were reviewed from the cochlear implant database...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28899830/simple-lateral-suboccipital-approach-and-modification-for-vertebral-artery-aneurysms-a-study-of-52-cases-over-10-years
#20
Mardjono Tjahjadi, Behnam Rezai-Jahromi, Joseph Serrone, Ville Nurminen, Joham Choque-Velasquez, Riku Kivisaari, Hanna Lehto, Mika Niemelä, Juha Hernesniemi
INTRODUCTION: Complex skull base approaches are frequently used to treat intracranial vertebral artery (VA) and proximal posterior inferior cerebellar artery (PICA) aneurysms. These complex procedures are associated with higher risk of neurovascular injury. Hence, a less invasive surgical approach is needed to improve treatment's efficacy and safety. MATERIAL AND METHODS: A retrospective analysis was conducted on clinical and radiological data from surgeries where simple lateral suboccipital and "lateral enough" approaches were used to clip VA aneurysms in the Department of Neurosurgery at Helsinki University Central Hospital from 2000 - 2009...
September 9, 2017: World Neurosurgery
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