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Lateral skull base

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https://www.readbyqxmd.com/read/28808799/transorbital-endoscopic-approach-for-exposure-of-the-sylvian-fissure-middle-cerebral-artery-and-crural-cistern-an-anatomical-study
#1
João Paulo Almeida, Armando S Ruiz-Treviño, Sathwik R Shetty, Sacit B Omay, Vijay K Anand, Theodore H Schwartz
BACKGROUND: The availability of minimal access instrumentation and endoscopic visualization has revolutionized the field of minimally invasive skull base surgery. The transorbital endoscopic approach using an eyelid incision has been proposed as a new minimally invasive technique for the treatment of skull base pathology, mostly extradural tumors. Our study aims to evaluate the anatomical aspects and potential role of the transorbital endoscopic approach for exposure of the sylvian fissure, middle cerebral artery and crural cistern...
August 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28799880/a-morphometric-survey-of-the-parasellar-region-in-more-than-2700-skulls-emphasis-on-the-middle-clinoid-process-variants-and-implications-in-endoscopic-and-microsurgical-approaches
#2
Akshay Sharma, Gabrielle E Rieth, Joseph E Tanenbaum, James S Williams, Nakao Ota, Srikant Chakravarthi, Sunil Manjila, Amin Kassam, Bulent Yapicilar
OBJECTIVE The middle clinoid process (MCP) is a bony projection that extends from the sphenoid bone near the lateral margin of the sella turcica. The varied prevalence and morphological features of the MCP in populations stratified by age, race, and sex are unknown; however, the knowledge of its anatomy and preoperative recognition on CT scans can aid greatly in complication avoidance and management. The aim of this study was to further illustrate the surgical anatomy of the parasellar region and to quantify the incidence of MCP and caroticoclinoid rings (CCRs) in dried preserved human anatomical specimens...
August 11, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28799867/endoscope-assisted-repair-of-csf-otorrhea-and-temporal-lobe-encephaloceles-via-keyhole-craniotomy
#3
Pamela C Roehm, Derrick Tint, Norman Chan, Ryan Brewster, Vishad Sukul, Kadir Erkmen
OBJECTIVE Temporal lobe encephaloceles and cerebrospinal fluid otorrhea from temporal bone defects that involve the tegmen tympani and mastoideum are generally repaired using middle fossa craniotomy, mastoidectomy, or combined approaches. Standard middle fossa craniotomy exposes patients to dural retraction, which can lead to postoperative neurological complications. Endoscopic and minimally invasive techniques have been used in other surgeries to minimize brain retraction, and so these methods were applied to repair the lateral skull base...
August 11, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28791194/a-case-report-of-surgical-management-of-hemangiopericytoma-at-the-foramen-magnum
#4
Nobuhiko Arai, Satoshi Takahashi, Hatano Mami, Yukina Tokuda, Kazunari Yoshida
BACKGROUND: Hemangiopericytoma (HPC) is a highly vascularized mesenchymal tumor known for its high rates of recurrence and metastasis. The extent of tumor removal is known to be the most trustful prognostic factor. Skull base HPCs are challenging to treat because of the difficulty of the surgical approach and proximity to vital vascular and neuronal structures. We successfully treated a case of HPC at the ventral foramen magnum through surgical gross tumor removal via a far-lateral transcondylar approach...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28780715/innovation-in-neurosurgery-less-than-ideal-a-systematic-review
#5
REVIEW
I S Muskens, S J H Diederen, J T Senders, A H Zamanipoor Najafabadi, W R van Furth, A M May, T R Smith, A L Bredenoord, M L D Broekman
BACKGROUND: Surgical innovation is different from the introduction of novel pharmaceuticals. To help address this, in 2009 the IDEAL Collaboration (Idea, Development, Exploration, Assessment, Long-term follow-up) introduced the five-stage framework for surgical innovation. To evaluate the framework feasibility for novel neurosurgical procedure introduction, two innovative surgical procedures were examined: the endoscopic endonasal approach for skull base meningiomas (EEMS) and the WovenEndobridge (WEB device) for endovascular treatment of intracranial aneurysms...
August 6, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28748855/clinical-characteristics-and-endoscopic-endonasal-removal-of-foreign-bodies-within-sinuses-orbit-and-skull-base
#6
Yi-Hui Wen, Wei-Jian Hou, Wen-Bin Lei, Feng-Hong Chen, Xiao-Lin Zhu, Zhang-Feng Wang, Ren-Qiang Ma, Wei-Ping Wen
BACKGROUND: Foreign bodies within the sinuses, orbit, and skull base (FBSOS) are rare; hence, diagnosis and management guidelines are lacking. Endoscopic sinus surgery (ESS) removal is preferred because of the less invasiveness and minimal morbidity. This study was designed to summarize clinical experience with ESS management of FBSOS. METHODS: We retrospectively reviewed clinical manifestations, imaging findings, treatment, and outcomes in consecutive patients with ESS removal of FBSOS between 2004 and 2015 at a tertiary academic medical center...
August 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28731399/expanding-the-endoscopic-transpterygoid-corridor-to-the-petroclival-region-anatomical-study-and-volumetric-comparative-analysis
#7
Jacob L Freeman, Raghuram Sampath, Steven Craig Quattlebaum, Michael A Casey, Zach A Folzenlogen, Vijay R Ramakrishnan, A Samy Youssef
OBJECTIVE The endoscopic endonasal transmaxillary transpterygoid (TMTP) approach has been the gateway for lateral skull base exposure. Removal of the cartilaginous eustachian tube (ET) and lateral mobilization of the internal carotid artery (ICA) are technically demanding adjunctive steps that are used to access the petroclival region. The gained expansion of the deep working corridor provided by these maneuvers has yet to be quantified. METHODS The TMTP approach with cartilaginous ET removal and ICA mobilization was performed in 5 adult cadaveric heads (10 sides)...
July 21, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28707338/evaluation-of-interthalamic-adhesion-size-as-an-indicator-of-brain-atrophy-in-dogs-with-and-without-cognitive-dysfunction
#8
Daji Noh, Sooyoung Choi, Hojung Choi, Youngwon Lee, Kija Lee
Interthalamic adhesion thickness has been previously described as a parameter for quantifying canine brain atrophy and hypothesized to correlate with brain height or ventricular size. However, studies testing this hypothesis are lacking. This retrospective cross-sectional study aimed to compare interthalamic adhesion thickness, interthalamic adhesion thickness/brain height ratio, and interthalamic adhesion thickness/brain height ratio/lateral ventricle to brain height ratio values in dogs with and without cognitive dysfunction...
July 13, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28688556/pediatric-langerhans-cell-histiocytosis-of-the-lateral-skull-base
#9
Ananya Majumder, Cameron C Wick, Rebecca Collins, Timothy N Booth, Brandon Isaacson, J Walter Kutz
OBJECTIVE: Describe the presentation, imaging characteristics, management, and outcomes of pediatric patients with Langerhans cell histiocytosis (LCH) of the temporal bone. METHODS: A retrospective chart review was performed between 2000 and 2014 at a single tertiary care children's hospital. Fourteen patients were identified with a diagnosis of LCH and involvement of the temporal bone. RESULTS: Ten patients were female and ten were Caucasian...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28686718/morphological-variation-phylogenetic-relationships-and-geographic-distribution-of-the-baenidae-testudines-based-on-new-specimens-from-the-uinta-formation-uinta-basin-utah-usa
#10
Heather F Smith, J Howard Hutchison, K E Beth Townsend, Brent Adrian, Daniel Jager
We described newly discovered baenid specimens from the Uintan North American Land Mammal Age (NALMA), in the Uinta Formation, Uinta Basin, Utah. These specimens include a partial skull and several previously undescribed postcranial elements of Baena arenosa, and numerous well-preserved shells of B. arenosa and Chisternon undatum. Baenids from the Uintan NALMA (46.5-40 Ma) are critical in that they provide valuable insight into the morphology and evolution of the diverse and speciose baenid family near the end of its extensive radiation, just prior to the disappearance of this clade from the fossil record...
2017: PloS One
https://www.readbyqxmd.com/read/28686110/role-of-endoscopic-transnasal-surgery-for-skull-base-chondrosarcoma-a-retrospective-analysis-of-19-cases-at-a-single-institution
#11
Hirotaka Hasegawa, Masahiro Shin, Kenji Kondo, Shunya Hanakita, Akitake Mukasa, Taichi Kin, Nobuhito Saito
OBJECTIVE Skull base chondrosarcoma is one of the most intractable tumors because of its aggressive biological behavior and involvement of the internal carotid artery and cranial nerves (CNs). One of the most accepted treatment strategies for skull base chondrosarcoma has been surgical removal of the tumor in conjunction with proactive extensive radiation therapy (RT) to the original tumor bed. However, the optimal strategy has not been determined. The goal of this study was to evaluate the early results of endoscopic transnasal surgery (ETS)...
July 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28678067/reconstruction-of-parotidectomy-and-lateral-skull-base-defects
#12
Caitlin Bertelsen, Changxing Liu, Niels Kokot
PURPOSE OF REVIEW: The purpose of this review is to summarize the options for reconstruction of parotid and lateral skull base defects based on the size and functional requirements of the defect. RECENT FINDINGS: Free grafts with dermal fat or acellular human dermis, superficial musculoaponeurotic system flaps, and sternocleidomastoid flaps have been successful in preventing Frey's syndrome and restoring facial contour defects after superficial and total parotidectomy...
July 3, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28669443/i-125-brachytherapy-guided-by-individual-three-dimensional-printed-plates-for-recurrent-ameloblastoma-of-the-skull-base
#13
J-Y Liu, Q-W Man, Y-Q Ma, B Liu
Ameloblastoma is one of the most common benign odontogenic tumours of the mandible and the maxilla. Wide excision of the tumour is the first choice for treatment (except for unicystic ones). Patients with invaded margins or unresectable lesions may require radiotherapy. Today, permanent implantation of I(125) seeds is widely used in the treatment of cancer of the head and neck. We report a case of recurrent ameloblastoma of the base of the skull that was treated with I(125) brachytherapy. The outcome has been encouraging, with total disappearance of the tumour on positron emission tomography 18 months later...
June 29, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28652945/spontaneous-intracranial-hypotension-after-vestibular-schwannoma-resection-due-to-an-unexpected-pathology-tarlov-cysts
#14
Seth E Pross, Jeffrey D Sharon, Michael Lim, Abhay Moghekar, Aruna Rao, John P Carey
While infrequent, cerebrospinal fluid (CSF) leaks are known to occur after surgical resection of vestibular schwannomas. Early signs of CSF leak often include headache and altered mental status. If untreated, life-threatening complications can occur, including brainstem herniation and meningitis. The appropriate surgical treatment for a CSF leak requires accurate localization of the source. While the most likely location of a CSF leak after lateral skull base surgery is through the aerated portions of the temporal bone, we present a unique case of a man with a prolonged CSF leak after an acoustic tumor removal who was ultimately found to have an occult spinal perineural (Tarlov) cyst as the source...
May 19, 2017: Curēus
https://www.readbyqxmd.com/read/28647652/kinase-activity-in-recurring-primary-skull-base-chordomas-and-chondrosarcomas-identification-of-novel-pathways-of-oncogenesis-and-potential-drug-targets
#15
Philip Tatman, Joshua Osbun, Youssef Yakkioui, Sumanpret Kaur, Carolina Parada, Tina Busald, Donald Born, Owais Ahmad, Jing Zhang, Manuel Ferreira
OBJECTIVE: Chordomas and chondrosarcomas are tumors that can occur in the skull base. Currently, 45% of chordomas and 56% of chondrosarcomas recur within five years of surgery. The role of adjuvant therapy is highly debated. No pharmacotherapies have been approved by the FDA for chordomas or chondrosarcomas. The high propensity for recurrence and lack of definitive adjuvant therapy necessitates additional basic science research to identify molecular anomalies associated with recurrent disease...
June 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28610819/simulation-of-three-surgical-techniques-combined-with-two-different-bone-borne-forces-for-surgically-assisted-rapid-palatal-expansion-of-the-maxillofacial-complex-a-finite-element-analysis
#16
S C Möhlhenrich, A Modabber, K Kniha, F Peters, T Steiner, F Hölzle, U Fritz, S Raith
Surgically assisted rapid palatal expansion (SARPE) is a common treatment to correct transverse maxillary deficiencies. Finite element analysis was simulated for six designs of SARPE based on a computed tomography scan of a human skull: median osteotomy with palatal (type A) or alveolar ridge (type B) bone-borne force, additional lateral osteotomy with palatal (type C) or alveolar ridge (type D) bone-borne force, and additional pterygomaxillary separation with palatal (type E) or alveolar ridge (type F) bone-borne force...
June 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28603805/stress-and-displacement-patterns-in-the-craniofacial-skeleton-with-rapid-maxillary-expansion-a-finite-element-method-study
#17
J Priyadarshini, C M Mahesh, B S Chandrashekar, Abhishek Sundara, A V Arun, Vinay P Reddy
BACKGROUND: Rapid maxillary expansion (RME), indicated in the treatment of maxillary deficiency directs high forces to maxillary basal bone and to other adjacent skeletal bones. The aim of this study is to (i) evaluate stress distribution along craniofacial sutures and (ii) study the displacement of various craniofacial structures with rapid maxillary expansion therapy by using a Finite Element model. METHODS: An analytical model was developed from a dried human skull of a 12 year old male...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28603682/an-automated-methodology-for-assessing-anatomy-specific-instrument-motion-during-endoscopic-endonasal-skull-base-surgery
#18
R Alex Harbison, Yangming Li, Angelique M Berens, Randall A Bly, Blake Hannaford, Kris S Moe
Objectives  Describe instrument motion during live endoscopic skull base surgery (ESBS) and evaluate kinematics within anatomic regions. Design  Case series. Setting  Tertiary academic center. Participants  A single skull base surgeon performed six anterior skull base approaches to the pituitary. Main Outcomes and Measures  Time-stamped instrument coordinates were recorded using an optical tracking system. Kinematics (i.e., mean cumulative instrument travel, velocity, acceleration, and angular velocity) was calculated by anatomic region including nasal vestibule, anterior and posterior ethmoid, sphenoid, and lateral opticocarotid recess (lOCR) regions...
June 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28602922/the-spheno-pterional-point-a-strategic-point-for-burr-role-placement-in-frontotemporal-craniotomies
#19
Baltazar Leão Reis, Roberto Leal da Silveira, Sebastião Nataniel Silva Gusmão
BACKGROUND: Frontotemporal craniotomies are the most commonly performed neurosurgical approaches. We studied the external bony landmarks on the lateral surface of the skull to identify a "strategic" point where both the anterior and middle cranial fossae are exposed simultaneously during frontotemporal craniotomies through a single burr hole placed over the greater wing of sphenoid bone (spheno-pterional point). OBJECTIVE: This study aimed to anatomically define the spheno-pterional point via craniometric measurements taken on the lateral surface of the human skull...
June 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28576543/pycnodysostosis-at-otorhinolaryngology
#20
Tekin Baglam, Adem Binnetoglu, Muhammet Fatih Topuz, Nilay Baş Ikizoglu, Refika Ersu, Serap Turan, Murat Sarı
AIM: Pycnodysostosis is a rare autosomal, recessive, skeletal dysplasia caused by a mutation in the cathepsin k gene. Pycnodysostosis is characterized by short stature, characteristic facial appearance (delayed closure of fontanelles and cranial sutures, mandibular hypoplasia and angle disorder, blue sclera), and acroosteolysis of the distal phalanges. Our aim was to describe the otorhinolaryngologic findings, differential diagnoses, various treatment options, and followup in eight cases of pycnodysostosis...
April 2017: International Journal of Pediatric Otorhinolaryngology
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