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Anterior Skull Base

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https://www.readbyqxmd.com/read/28716213/imaging-of-endoscopic-approaches-to-the-anterior-and-central-skull-base
#1
REVIEW
I M Schmalfuss
Sinonasal endoscopy for treatment of benign sinonasal diseases is a well-established procedure. Recent advances in endoscope technology have substantially expanded its application with many institutions now offering resection of skull base lesions and sinonasal malignancies via the endoscopic approach. Its minimally invasive nature leads to faster recovery time, better cosmetic results, and fewer complications. Unfortunately, not all lesions involving the sinonasal region and skull base are accessible to sinonasal endoscopy...
July 14, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28707807/accuracy-of-computer-assisted-navigation-significant-augmentation-by-facial-recognition-software
#2
Jordan T Glicksman, Christine Reger, Arjun K Parasher, David W Kennedy
BACKGROUND: Over the past 20 years, image guidance navigation has been used with increasing frequency as an adjunct during sinus and skull base surgery. These devices commonly utilize surface registration, where varying pressure of the registration probe and loss of contact with the face during the skin tracing process can lead to registration inaccuracies, and the number of registration points incorporated is necessarily limited. The aim of this study was to evaluate the use of novel facial recognition software for image guidance registration...
July 14, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28689230/the-extended-transnasal-transsphenoidal-approach-for-anterior-skull-base-meningioma-considerations-in-patient-selection
#3
Joseph P Castlen, David J Cote, Hasan A Zaidi, Edward R Laws
PURPOSE: In this study, we set out to define our institutional criteria for patient eligibility for transsphenoidal resection of parasellar meningiomas, and to report our experience with extended transnasal approaches for these lesions. We aimed to discuss the important considerations of patient selection and risk stratification to optimize outcomes for patients with these difficult lesions, and also include considerations that should be reviewed during surgical approach selection. METHODS: Medical records from Brigham and Women's Hospital were retrospectively reviewed for all patients who underwent transsphenoidal surgery for pituitary disease with the senior author from April 2008 to March 2017 (938 procedures)...
July 8, 2017: Pituitary
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
#4
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/28665391/-tactics-of-reconstructive-closure-of-basal-defects-after-resection-of-midline-tumors-of-the-anterior-skull-base-a-literature-review
#5
D A Gol'bin, S N Mindlin
The purpose of this review is to analyze the techniques used to reconstruct midline defects in the anterior skull base after transcranial and endoscopic endonasal resection of skull base tumors. We provide brief information on the technique for preparing various flaps, indications and contraindications, and advantages and disadvantages. We analyze the international experience in the use of vascularized and non-vascularized flaps as well as the existing algorithms for reconstruction of complex defects of the midline structures of the skull base...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28655484/-anterior-skull-base-schwannoma
#6
Miguel Esquivel-Miranda, Elier De la O Ríos, Emmanuelle Vargas-Valenciano, Eva Moreno-Medina
Schwannomas are nerve sheath tumours that originate in Schwann cells. They are usually solitary and sporadic and manifest on peripheral, spinal or cranial nerves. Intracranial schwannomas tend to manifest on the eighth cranial nerve, particularly in patients with neurofibromatosis type2. Anterior skull-base schwannomas represent less than 1% of all intracranial schwannomas. They are more frequent in young people and are typically benign. These tumours represent a diagnostic challenge due to their rarity and difficult differential diagnosis, and numerous theories have been postulated concerning their origin and development...
June 24, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28643505/a-case-of-igg4-related-pseudotumor-affecting-ethmoid-orbit-and-anterior-skull-base
#7
Davide Soloperto, Cristoforo Fabbris, Flavia DI Maro, Daniele Marchioni
No abstract text is available yet for this article.
June 22, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28630745/correlation-between-hox-code-and-vertebral-morphology-in-the-mouse-towards-a-universal-model-for-synapsida
#8
Christine Böhmer
BACKGROUND: The importance of the cervical vertebrae as part of the skull-neck system in facilitating the success and diversity of tetrapods is clear. The reconstruction of its evolution, however, is problematic because of the variation in the number of vertebrae, making it difficult to identify homologous elements. Quantification of the morphological differentiation in the neck of diverse archosaurs established homologous units of vertebrae (i.e. modules) resulting from Hox gene expression patterns within the cervical vertebral column...
2017: Zoological Letters
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
#9
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
#10
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
#11
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
#12
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/28598276/risk-factors-associated-with-postoperative-cerebrospinal-fluid-leak-after-endoscopic-endonasal-skull-base-surgery
#13
Shannon Fraser, Paul A Gardner, Maria Koutourousiou, Mark Kubik, Juan C Fernandez-Miranda, Carl H Snyderman, Eric W Wang
OBJECTIVE The aim in this paper was to determine risk factors for the development of a postoperative CSF leak after an endoscopic endonasal approach (EEA) for resection of skull base tumors. METHODS A retrospective review of patients who underwent EEA for the resection of intradural pathology between January 1997 and June 2012 was performed. Basic demographic data were collected, along with patient body mass index (BMI), tumor pathology, reconstruction technique, lumbar drainage, and outcomes. RESULTS Of the 615 patients studied, 103 developed a postoperative CSF leak (16...
June 9, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28593111/phantosmia-and-dysgeusia-following-endoscopic-transcribriform-approaches-to-olfactory-groove-meningiomas
#14
Andrew S Venteicher, Jay I Kumar, Emma A Murphy, Stacey T Gray, Eric H Holbrook, William T Curry
The endoscopic, endonasal transcribriform approach (EETA) is an important technique used to directly access the anterior skull base and is increasingly being used in the management of olfactory groove meningiomas (OGMs). As this approach requires removal of the cribriform plate and olfactory epithelium en route to the tumor, patients are anosmic postoperatively. Here, we report the development of phantosmia and dysgeusia in two patients who underwent EETAs for OGMs, which has not yet been reported in the literature...
June 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28593109/extent-of-endoscopic-resection-for-anterior-skull-base-tumors-an-mri-based-volumetric-analysis
#15
Ian J Koszewski, Gregory Avey, Azam Ahmed, Lucas Leonhard, Matthew R Hoffman, Timothy M McCulloch
Objective  To determine the volume of ventral skull base tumor removed following endoscopic endonasal (EEA) resection using MRI-based volumetric analysis and to evaluate the inter-rater reliability of such analysis. Design  Retrospective case series. Setting  Academic tertiary care hospital. Participants  EEA patients November 2012 to August 2015. Main Outcome Measures  Volumetric analysis of pre- and immediately postoperative MR imaging was performed independently by two investigators. The percentage of total tumor resected was evaluated according to resection goal and tumor type...
June 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28573750/chondrification-and-character-identification-in-the-skull-exemplified-for-the-basicranial-anatomy-of-early-squamate-embryos
#16
Oleksandr Yaryhin, Ingmar Werneburg
The neurocranium of vertebrates is mainly derived from early cartilaginous anlagen, the so-called chondrocranium, the base of the future skull. Two initial bar-shaped and paired chondrifications flank the notochord, the rostral trabecles and the caudal parachordals. In most reptiles, there is an additional component, the transverse acrochordal, which is placed between trabecles and parachordals. All these elements compose the base of the future chondrocranium. There are several drastically different hypotheses concerning the development and interrelationship of these elements...
June 1, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28553859/the-relationship-between-selected-parameters-of-a-cephalometric-analysis-determining-the-vertical-morphology-of-facial-skeleton-and-bite-force
#17
Jolanta Szymańska, Łukasz Sidorowicz
BACKGROUND: There are few studies devoted to an assessment of the relation between bite force and detailed results of cephalometric analysis that determine craniofacial structure. The purpose of the study was to assess the correlation between the selected criteria determining the craniofacial structure and bite force in patients with normal and increased vertical relation of the bases of jaws and skull. METHODS: The study material included 120 patients, aged between 7 and 17 years, who presented for examination and possible orthodontic treatment...
May 29, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28551599/a-rare-cause-of-acute-dysphagia-acute-calcific-tendonitis-of-the-longus-colli-muscle
#18
Hanadi Abou Dargham, Faton Bytyci, Christian Shuman, Anton Stolear
We are presenting a case of a 78-year-old female with multiple comorbidities and history of neck surgery, who presented with acute dysphagia, odynophagia and neck pain that has been progressively getting worse over the course of 2 days, with no recent injury or infection. The patient was afebrile. There were no visible signs of infection on routine oropharyngeal examination. Initial workup was unremarkable except for elevated erythrocyte sedimentation rate, C-reactive protein and creatinine. CT of the cervical spine ruled out any fracture or cervical spine injury but showed an area of calcification, prevertebral oedema and fluid collection inferior to the anterior arch of C1...
May 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28550406/statistical-shape-modelling-to-aid-surgical-planning-associations-between-surgical-parameters-and-head-shapes-following-spring-assisted-cranioplasty
#19
Naiara Rodriguez-Florez, Jan L Bruse, Alessandro Borghi, Herman Vercruysse, Juling Ong, Greg James, Xavier Pennec, David J Dunaway, N U Owase Jeelani, Silvia Schievano
PURPOSE: Spring-assisted cranioplasty is performed to correct the long and narrow head shape of children with sagittal synostosis. Such corrective surgery involves osteotomies and the placement of spring-like distractors, which gradually expand to widen the skull until removal about 4 months later. Due to its dynamic nature, associations between surgical parameters and post-operative 3D head shape features are difficult to comprehend. The current study aimed at applying population-based statistical shape modelling to gain insight into how the choice of surgical parameters such as craniotomy size and spring positioning affects post-surgical head shape...
May 26, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28541579/tailored-extended-bifrontal-craniotomy-for-anterior-skull-base-tumors-anatomic-description-of-a-modified-surgical-technique-and-case-series
#20
Michael M Safaee, Michael W McDermott, Arnau Benet, Philip V Theodosopoulos
BACKGROUND: Open transcranial approaches to the anterior skull base remain an integral component of current skull base practice. Evolution of these and other techniques has resulted in revisions of standard, tried-and-true methods in attempts to improve patient outcomes and cosmesis, while still providing the best combination of surgical exposure and ergonomics. OBJECTIVE: To describe a modified approach for midline tumors of the anterior skull base. METHODS: We describe the anatomy and techniques of a modified extended bifrontal craniotomy for anterior skull base tumors...
May 24, 2017: Operative Neurosurgery (Hagerstown, Md.)
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