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endoscopic skull base anatomy

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https://www.readbyqxmd.com/read/28392037/next-generation-surgical-navigation-systems-in-sinus-and-skull-base-surgery
#1
REVIEW
Martin J Citardi, William Yao, Amber Luong
Over the past 25 years, rhinologists have adopted surgical navigation technology for endoscopic sinus and skull base procedures. Navigation systems often produce a wide target registration error (TRE). Ideally, next-generation systems will include a leap in target registration error reduce TRE through innovative hardware and software. Incorporation of microsensors will be another important innovation. Future systems are likely to include augmented reality, which can project overlays of critical anatomy on real-world endoscopic images...
April 6, 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28359922/first-application-of-7t-magnetic-resonance-imaging-in-endoscopic-endonasal-surgery-of-skull-base-tumors
#2
Thomas F Barrett, Hadrien A Dyvorne, Francesco Padormo, Puneet S Pawha, Bradley N Delman, Raj K Shrivastava, Priti Balchandani
BACKGROUND: Successful endoscopic endonasal surgery for the resection of skull base tumors is reliant on preoperative imaging to delineate pathology from the surrounding anatomy. The increased signal-to-noise ratio afforded by 7T MRI can be used to increase spatial and contrast resolution, which may lend itself to improved imaging of skull base. In this study, we apply a 7T imaging protocol to patients with skull base tumors and compare the images to clinical standard of care. METHODS: Images were acquired at 7T on 11 patients with skull base lesions...
March 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28293965/endoscopic-approach-for-a-delayed-post-traumatic-ethmoidal-mucocele-a-technical-note
#3
Mahmoud Messerer, Giulia Cossu, Roy Thomas Daniel
OBJECTIVE: Delayed post-traumatic mucoceles are rare. We describe the surgical treatment of a post-traumatic ethmoidal mucocele with intra-orbital extension. METHOD: A uninostril endoscopic endonasal approach (EEA) was performed. The access was contralateral to the lesion to provide a wider lateral view. After a large sphenoid and ethmoid sinuses opening, the collection was drained and the optic nerve precociously identified. The orbital roof was eroded and the frontal dura mater directly visible...
March 15, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28118191/a-rare-concha-variation-coronal-cleft
#4
Serap Yucel, Hediye Pinar Gunbey, Emre Gunbey, Asli Sayit Tanrivermis, Kerim Aslan
Nasal turbinates are embryologically derived from a series of outgrowths from the foetal lateral nasal wall. These outgrowths form a series of ridges, referred to as "ethmoturbinals" and have several vital functions. Several different turbinate variations have been reported so far. The authors presented 3 patients of coronal clefted concha who were diagnosed with magnetic resonance imaging. Computed tomography scans and nasal endoscopic examinations are also performed subsequently. These patients are the first coronal clefted concha cases in the literature and also the first radiological study defining concha cleft...
January 23, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906848/calculation-of-an-optic-nerve-injury-risk-profile-before-sphenoid-sinus-surgery
#5
Erdem Atalay Cetinkaya, Koray Koc, Mehmet Fatih Kucuk, Pinar Koc, Nuray Bayar Muluk, Cemal Cingi
OBJECTIVES: Our objective was to analyze variations in the optic nerve (ON) course and surrounding structures in an effort to construct an optic nerve injury risk profile before endoscopic intranasal sphenoidal, or endoscopic endonasal transphenoidal, skull-base surgery, and eventually to construct and formulate a common classification by combining the known classes. The authors used computed tomography (CT) toward this end. METHODS: The authors retrospectively reviewed 200 consecutive CT scans (400 sides) of the paranasal sinuses...
January 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27890187/imaging-of-paranasal-sinuses-and-anterior-skull-base-and-relevant-anatomic-variations
#6
REVIEW
Estushi Iida, Yoshimi Anzai
This article reviews the normal anatomy and variants of the anterior skull base and sinonasal cavities that are relevant to endoscopic sinus and skull base surgery. Radiologists should be aware of sinonasal anatomy that can be impediments to surgical access and increase risk of vascular or cranial nerve injury during surgery. Imaging features of the paranasal sinuses and anterior skull base pathologies are also discussed.
January 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/27767395/endoscopic-endonasal-transclival-resection-of-a-ventral-pontine-cavernous-malformation-technical-case-report
#7
Juan Luis Gómez-Amador, Luis Alberto Ortega-Porcayo, Isaac Jair Palacios-Ortíz, Alexander Perdomo-Pantoja, Felipe Eduardo Nares-López, Alfredo Vega-Alarcón
Brainstem cavernous malformations are challenging due to the critical anatomy and potential surgical risks. Anterolateral, lateral, and dorsal surgical approaches provide limited ventral exposure of the brainstem. The authors present a case of a midline ventral pontine cavernous malformation resected through an endoscopic endonasal transclival approach based on minimal brainstem transection, negligible cranial nerve manipulation, and a straightforward trajectory. Technical and reconstruction technique advances in endoscopic endonasal skull base surgery provide a direct, safe, and effective corridor to the brainstem...
October 21, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27762178/role-of-targeted-magnetic-resonance-imaging-sequences-in-the-surgical-management-of-anterior-skull-base-pathology
#8
S Chawla, J Bowman, M Gandhi, B Panizza
BACKGROUND: The skull base is a highly complex anatomical region that provides passage for important nerves and vessels as they course into and out of the cranial cavity. Key to the management of pathology in this region is a thorough understanding of the anatomy, with its variations, and the relationship of various neurovascular structures to the pathology in question. Targeted high-resolution magnetic resonance imaging on high field strength magnets can enable the skull base surgeon to understand this intricate relationship and deal with the pathology from a position of relative advantage...
January 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27754596/educational-utility-of-advanced-three-dimensional-virtual-imaging-in-evaluating-the-anatomical-configuration-of-the-frontal-recess
#9
Abib Agbetoba, Amber Luong, Jin Keat Siow, Brent Senior, Claudio Callejas, Kornel Szczygielski, Martin J Citardi
BACKGROUND: Endoscopic sinus surgery represents a cornerstone in the professional development of otorhinolaryngology trainees. Mastery of these surgical skills requires an understanding of paranasal sinus and skull-base anatomy. The frontal sinus is associated with a wide range of variation and complex anatomical configuration, and thus represents an important challenge for all trainees performing endoscopic sinus surgery. METHODS: Forty-five otorhinolaryngology trainees and 20 medical school students from 5 academic institutions were enrolled and randomized into 1 of 2 groups...
February 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27588594/the-endoscopic-anatomy-of-the-middle-ear-approach-to-the-fundus-of-the-internal-acoustic-canal
#10
Noritaka Komune, Satoshi Matsuo, Koichi Miki, Albert L Rhoton
OBJECTIVE The application of the endoscope in the lateral skull base increases the importance of the middle ear cavity as the corridor to the skull base. The aim of this study was to define the middle ear as a route to the fundus (lateral end) of the internal acoustic canal and to propose feasible landmarks to the fundus. METHODS This was a cadaveric study; 34 adult cadaveric temporal bones and 2 dry bones were dissected with the aid of the endoscope and microscope to show the anatomy of the transcanal approach to the middle ear and fundus of the internal acoustic canal...
September 2, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27546341/endoscope-assisted-transmaxillosphenoidal-approach-to-the-sellar-and-parasellar-regions-an-anatomic-study
#11
Filippo Gagliardi, Carmine A Donofrio, Alfio Spina, Michele Bailo, Cristian Gragnaniello, Alberto L Gallotti, Samer K Elbabaa, Anthony J Caputy, Pietro Mortini
BACKGROUND: Anterolateral skull base surgery in the sellar and parasellar regions has always represented a technical challenge for neurosurgeons. The microscopic endoscope-assisted transmaxillosphenoidal approach (MEMSA) affords a direct surgical corridor free from critical skull base structures. Here we describe and critically evaluate the use of MEMSA to access the sellar and parasellar areas, in terms of surgical exposure and operability. METHODS: Six cadaveric heads were examined...
November 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27471895/endoscopic-versus-microscopic-microvascular-decompression-for-trigeminal-neuralgia-equivalent-pain-outcomes-with-possibly-decreased-postoperative-headache-after-endoscopic-surgery
#12
John Y K Lee, John T Pierce, Sukhmeet K Sandhu, Dmitriy Petrov, Andrew I Yang
OBJECTIVE Endoscopic surgery has revolutionized surgery of the ventral skull base but has not yet been widely adopted for use in the cerebellopontine angle. Given the relatively normal anatomy of the cerebellopontine angle in patients with trigeminal neuralgia (TN), the authors hypothesized that a fully endoscopic microvascular decompression (E-MVD) might provide pain outcomes equivalent to those of microscopic MVD (M-MVD) but with fewer complications. METHODS The authors conducted a single-institution, single-surgeon retrospective study with patients treated in the period of 2006-2013...
July 29, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27441154/paraclival-or-cavernous-internal-carotid-artery-one-segment-but-two-names
#13
Puya Alikhani, Sananthan Sivakanthan, Harry van Loveren, Siviero Agazzi
BACKGROUND: The anatomy of the carotid artery has traditionally been understood into segments that correspond to the surrounding relevant anatomy. Transcranial surgery favors the seven segments classification initially posited by our group in 1996. With the advent of endoscopic approaches a new term has been added to the carotid anatomy lexicon "the paraclival internal carotid artery (ICA)." This "paraclival" carotid is a very familiar segment for all endoscopically trained skull base surgeons but a clear correlate to the transcranial anatomy has not been described...
August 2016: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/27093827/-the-progress-of-research-about-anatomy-of-posterolateral-wall-of-maxillary-sinus-in-endoscopic-surgery
#14
REVIEW
Li Gao, Xinsheng Huang
As an important landmark, the posterolateral wall of maxillary sinus can help to locate numbers of significant signs such as maxillary artery and its branches, maxillary nerve and infraorbital nerve, infratemporal fossa and pterygopalatine fossa etc. in the endoscopic surgery for paranasal sinuses and lateral skull base. This article reviewed related researches about the anatomy and endoscopic surgery of posterolateral wall of maxillary sinus.
December 2015: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/27070254/-the-use-of-intraoperative-doppler-ultrasound-in-endoscopic-transsphenoidal-surgery
#15
O I Sharipov, M A Kutin, P L Kalinin, D V Fomichev, V A Lukshin, A B Kurnosov
INTRODUCTION: Doppler ultrasound (DUS) has been widely used in neurosurgical practice to diagnose various cerebrovascular diseases. This technique is used in transsphenoidal surgery to identify the localization of intracranial arteries when making an approach or during tumor resection. MATERIAL AND METHODS: To identify the cavernous segment of the internal carotid artery (ICA) and/or basilar artery during endoscopic transsphenoidal surgery, we used a combined device on the basis of a click line curette («Karl Storz») and a 16 MHz Doppler probe (Lassamed)...
2016: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/27010730/intranasal-volume-changes-caused-by-the-endoscopic-endonasal-transsphenoidal-approach-and-their-effects-on-nasal-functions
#16
Do Hyun Kim, Yong-Kil Hong, Sin-Soo Jeun, Yong Jin Park, Soo Whan Kim, Jin Hee Cho, Boo Young Kim, Sungwoo Han, Yong Joo Lee, Jae Hyung Hwang, Sung Won Kim
OBJECTIVE: We evaluated postoperative changes in nasal cavity volume and their effects on nasal function and symptoms after endoscopic endonasal transsphenoidal approach for antero-central skull base surgery. STUDY DESIGN: Retrospective chart review at a tertiary referral center. METHODS: We studied 92 patients who underwent binostril, four-hand, endoscopic endonasal transsphenoidal approach surgery using the bilateral modified nasoseptal rescue flap technique...
2016: PloS One
https://www.readbyqxmd.com/read/27010229/surgical-telementoring-a-new-model-for-surgical-training
#17
Carl H Snyderman, Paul A Gardner, Bostjan Lanisnik, Janez Ravnik
OBJECTIVES/HYPOTHESIS: To assess the efficacy of a surgical telementoring program for endoscopic skull base surgery. STUDY DESIGN: Prospective case series with surveys of surgeons. METHODS: A surgical telementoring program was established for mentoring of a skull base team at the University of Maribor in Slovenia by an experienced skull base team at the University of Pittsburgh Medical Center in Pennsylvania. Two-way video and audio streaming provided real-time communication with the surgical team...
June 2016: Laryngoscope
https://www.readbyqxmd.com/read/26987633/the-inferolateral-transorbital-endoscopic-approach-a-preclinical-anatomic-study
#18
Marco Ferrari, Alberto Schreiber, Davide Mattavelli, Francesco Belotti, Vittorio Rampinelli, Davide Lancini, Francesco Doglietto, Marco Maria Fontanella, Manfred Tschabitscher, Luigi Fabrizio Rodella, Piero Nicolai
BACKGROUND: In recent years, transorbital endoscopic approaches are increasing in popularity as they provide several corridors to reach lateral areas of the ventral skull base through the orbit. The aim of this study is to investigate the feasibility of the inferolateral transorbital endoscopic approach (ILTEA) by detailing the step-by-step dissection, anatomic landmarks, and target anatomic areas. METHODS: Seven cadaveric specimens (14 sides) were dissected in the Laboratory of Endoscopic Anatomy of the University of Brescia...
June 2016: World Neurosurgery
https://www.readbyqxmd.com/read/26943844/infraorbital-nerve-a-surgically-relevant-landmark-for-the-pterygopalatine-fossa-cavernous-sinus-and-anterolateral-skull-base-in-endoscopic-transmaxillary-approaches
#19
Ali M Elhadi, Hasan A Zaidi, Kaan Yagmurlu, Shah Ahmed, Albert L Rhoton, Peter Nakaji, Mark C Preul, Andrew S Little
OBJECTIVE Endoscopic transmaxillary approaches (ETMAs) address pathology of the anterolateral skull base, including the cavernous sinus, pterygopalatine fossa, and infratemporal fossa. This anatomically complex region contains branches of the trigeminal nerve and external carotid artery and is in proximity to the internal carotid artery. The authors postulated, on the basis of intraoperative observations, that the infraorbital nerve (ION) is a useful surgical landmark for navigating this region; therefore, they studied the anatomy of the ION and its relationships to critical neurovascular structures and the maxillary nerve (V2) encountered in ETMAs...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/26930925/-the-anatomical-research-progress-of-extended-endoscopic-endonasal-approach-to-the-clivus
#20
REVIEW
Wenlong Tang, Xianhai Zeng, Shuqi Qiu
The clival region refers to the skull base between dorsum sellae and anterior border of foramen magnum. It is located in central area of skull base and is in close proximity to pons, medulla oblongata, basilar artery and other crucial intracranial structures. Although there are various microsurgical approaches using craniotomy to reach this region, there are still a lot of difficulty in exposure of clivus. With the increasing development in extended endoscopic endonasal approach, a new route to clivus, as well as meticulous endoscopic anatomy studies is emerging...
November 2015: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
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