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Anterior 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/28768937/definitive-surgical-treatment-of-osteomalacia-induced-by-skull-base-tumor-and-determination-of-the-half-life-of-serum-fibroblast-growth-factor-23
#3
Taijun Hana, Shota Tanaka, Hirofumi Nakatomi, Masaaki Shojima, Seiji Fukumoto, Masako Ikemura, Nobuhito Saito
Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome often associated with fibroblast growth factor 23 (FGF23)-producing tumors such as phosphaturic mesenchymal tumor, mixed connective tissue variant (PMTMCT) affecting the bone and soft tissue. We experienced a patient with progressive bone and muscle pain due to FGF23-related TIO. Venous sampling had strongly suggested the anterior skull base as a source of FGF23, which led to the discovery of a small tumor in the ethmoid sinus extending intracranially...
August 2, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28767609/sinonasal-renal-cell-like-adenocarcinoma-a-unique-variant-of-primary-clear-cell-carcinoma-of-the-head-and-neck-the-first-reported-case-in-korea
#4
Nah-Ihm Kim, Jung-In Yang, Sung-Sun Kim, Ji-Shin Lee, Sang-Chul Lim, Shin Jung, Jae-Hyuk Lee, Kyung-Sub Moon, Kyung-Hwa Lee
RATIONALE: Primary sinonasal renal cell-like adenocarcinoma (SNRCLA) is a rare and unique neoplasm. PATIENT CONCERNS: A 63-year-old man presented with repeated epistaxis, nasal obstruction and hyposmia of 2-month duration. Radiological studies revealed a mass of the left ethmoid sinus involving anterior skull base. DIAGNOSIS: The patient was treated with craniofacial resection, bifrontal craniotomy combined with an endonasal endoscopic approach...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28762259/congenital-muscle-dystrophy-and-diet-consistency-affect-mouse-skull-shape-differently
#5
Alexander Spassov, Viviana Toro-Ibacache, Mirjam Krautwald, Heinrich Brinkmeier, Kornelius Kupczik
The bones of the mammalian skull respond plastically to changes in masticatory function. However, the extent to which muscle function affects the growth and development of the skull, whose regions have different maturity patterns, remains unclear. Using muscle dissection and 3D landmark-based geometric morphometrics we investigated the effect of changes in muscle function established either before or after weaning, on skull shape and muscle mass in adult mice. We compared temporalis and masseter mass and skull shape in mice with a congenital muscle dystrophy (mdx) and wild type (wt) mice fed on either a hard or a soft diet...
July 31, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28762040/case-update-on-cranial-osteopetrosis-which-is-the-role-of-the-neurosurgeon
#6
Irene Stella, Matthieu Vinchon, Pierre Guerreschi, Eva De Berranger, Ikram Bouacha
PURPOSE: Osteopetrosis (OP) is a rare skeletal disease, which can affect the skull base and calvaria. A multidisciplinary approach is mandatory and patient may need neurosurgical care. Few observations have been published, and optimal management of OP is not established yet. METHOD: We report a case of an infant with OP diagnosed at 5 months, who presented signs of intracranial hypertension associated with unilateral blindness. Bone marrow allograft was performed at 6 months of age...
July 31, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28761532/skull-base-bony-lesions-management-nuances-a-retrospective-analysis-from-a-tertiary-care-centre
#7
Amit Kumar Singh, Arun Kumar Srivastava, Jayesh Sardhara, Kamlesh Singh Bhaisora, Kuntal Kanti Das, Anant Mehrotra, Rabi Narayan Sahu, Awadhesh Kumar Jaiswal, Sanjay Behari
BACKGROUND: Skull base lesions are not uncommon, but their management has been challenging for surgeons. There is large no of bony tumors at the skull base which has not been studied in detail as a group. These tumors are difficult not only because of their location but also due to their variability in the involvement of important local structure. Through this retrospective analysis from a Tertiary Care Centre, we are summarizing the details of skull base bony lesions and its management nuances...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28716213/imaging-of-endoscopic-approaches-to-the-anterior-and-central-skull-base
#8
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
#9
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
#10
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
#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/28665391/-tactics-of-reconstructive-closure-of-basal-defects-after-resection-of-midline-tumors-of-the-anterior-skull-base-a-literature-review
#12
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
#13
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
#14
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
#15
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
#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/28598276/risk-factors-associated-with-postoperative-cerebrospinal-fluid-leak-after-endoscopic-endonasal-skull-base-surgery
#20
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
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