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https://www.readbyqxmd.com/read/28645603/robotic-transnasal-endoscopic-skull-base-surgery-systematic-review-of-the-literature-and-report-of-a-novel-prototype-for-a-hybrid-system-bear
#1
Andrea Bolzoni Villaret, Francesco Doglietto, Andrea Carobbio, Alberto Schreiber, Camilla Panni, Enrico Piantoni, Giovanni Guida, Marco Maria Fontanella, Piero Nicolai, Riccardo Cassinis
BACKGROUND: Although robotics has already been applied to several surgical fields, available systems are not designed for endoscopic skull base surgery (ESBS). New-conception prototypes have been recently described for ESBS. AIM OF THE STUDY: To provide a systematic literature review of robotics for ESBS and describe a novel prototype developed at the University of Brescia. MATERIAL AND METHODS: PubMed and Scopus databases were searched using a combination of terms, including Robotics OR Robot and Surgery OR Otolaryngology OR Skull Base OR Holder...
June 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28645591/surgical-repair-of-iatrogenic-transverse-sigmoid-sinus-laceration-with-a-dural-flap-during-skull-base-tumor-surgery-a-technical-case-report
#2
Gerald S Oh, Gregory D Arnone, Hussam Abou-Al-Shaar, Ashley L Barks, Andrew Wong, Fady T Charbel
BACKGROUND: Injury to cerebral venous sinuses during craniotomy procedures can cause significant blood loss or venous air embolism potentially leading to serious morbidity or mortality. When iatrogenic sinus injuries occur, it is essential to promptly obtain hemostasis and repair the sinus defect. CASE DESCRIPTION: The authors report a 43-year-old female that sustained a transverse-sigmoid sinus injury during a retrosigmoid craniotomy for resection of a cerebellopontine angle meningioma...
June 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28645586/venous-sinus-stenting-in-the-management-of-patients-with-intracranial-hypertension-manifesting-with-skull-base-cerebrospinal-fluid-leaks
#3
Rajiv R Iyer, David Solomon, Abhay Moghekar, C Rory Goodwin, Charles M Stewart, Masaru Ishii, Philippe Gailloud, Gary L Gallia
BACKGROUND: A subset of patients with skull base cerebrospinal fluid (CSF) leaks are found to have elevated intracranial pressure (ICP). In these patients, elevated ICP is thought to contribute to both the pathophysiology of the leak as well as postoperative leak recurrences. Current strategies for post-operative ICP control include medical therapy and shunting procedures. The aim of this study is to report the use of venous sinus stenting (VSS) in the management of patients with skull base CSF leaks due to elevated ICP...
June 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28644905/a-realistic-phantom-for-validating-mri-based-synthetic-ct-images-of-the-human-skull
#4
Abraam S Soliman, Levi Burns, Amir Owrangi, Young Lee, William Y Song, Greg Stanisz, Brige P Chugh
PURPOSE: To introduce a new realistic human skull phantom for the validation of synthetic CT images of cortical bone from ultra-short echo-time (UTE) sequences. METHODS AND MATERIALS: A human skull of an adult female was utilized as a realistic representation of skull cortical bone. The skull was stabilized in a special acrylic container and was filled with contrast agents that have T1 and T2 relaxation times similar to human brain. The phantom was MR scanned at 3T with UTE and T2 -weighted sequences, followed by CT...
June 23, 2017: Medical Physics
https://www.readbyqxmd.com/read/28643505/a-case-of-igg4-related-pseudotumor-affecting-ethmoid-orbit-and-anterior-skull-base
#5
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/28643170/predictors-and-incidence-of-orthostatic-headache-associated-with-lumbar-drain-placement-following-endoscopic-endonasal-skull-base-surgery
#6
Buqing Liang, Sathwik R Shetty, Sacit Bulent Omay, Joao Paulo Almeida, Shilei Ni, Yu-Ning Chen, Armando S Ruiz-Treviño, Vijay K Anand, Theodore H Schwartz
BACKGROUND: Orthostatic headache (OH) is a potential complication of lumbar drainage (LD) usage. The incidence and risk factors for OH with the use of lumbar drainage during endoscopic endonasal procedures have not been documented. OBJECTIVE: To investigate the incidence of post-procedure OHs associated with placement of LD in patients undergoing endoscopic endonasal procedures. METHODS: We prospectively noted the placement of LDs in a consecutive series of endoscopic endonasal skull base surgeries...
June 22, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28631996/role-of-diffusion-weighted-imaging-in-skull-base-lesions-a-pictorial-review
#7
Neetu Soni, Nishant Gupta, Yogesh Kumar, Manisha Mangla, Rajiv Mangla
Skull base lesions can be related to wide number of pathologies including infections, benign and malignant tumors. Accurate diagnosis and differentiation between these entities is important for prompt and appropriate treatment. However, computed tomography and routine magnetic resonance imaging techniques only provide information on the extent of the lesions, with limited ability to differentiate between benign and malignant lesions. Diffusion-weighted imaging can help in many such situations by providing additional information, including help in differentiating benign from malignant lesions, so that appropriate treatment can be initiated...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28631685/-the-transperygoid-approach-to-the-removal-of-a-recurrent-juvenile-angiofibroma-at-the-base-of-the-skull-without-preoperative-embolization
#8
N S Grachev, I N Vorozhtsov
The authors report a clinical case of successful elimination of a recurrent juvenile angiofibroma at the base of the skull (JAFBS) with the application of the optical navigation system and a cold plasma scalpel in the absence of preoperative embolization. It has been demonstrated using the proposed transperygoid approach to the extirpation of the tumour that a recurrent juvenile angiofibroma at the base of the skull can be efficiently removed by means of a modern minimally invasive and at the same time radical surgical method...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28630745/correlation-between-hox-code-and-vertebral-morphology-in-the-mouse-towards-a-universal-model-for-synapsida
#9
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/28625158/a-minimally-invasive-method-for-sampling-human-petrous-bones-from-the-cranial-base-for-ancient-dna-analysis
#10
Kendra A Sirak, Daniel M Fernandes, Olivia Cheronet, Mario Novak, Beatriz Gamarra, Tímea Balassa, Zsolt Bernert, Andrea Cséki, János Dani, József Zsolt Gallina, Gábor Kocsis-Buruzs, Ivett Kővári, Orsolya László, Ildikó Pap, Róbert Patay, Zsolt Petkes, Gergely Szenthe, Tamás Szeniczey, Tamás Hajdu, Ron Pinhasi
Ancient DNA (aDNA) research involves invasive and destructive sampling procedures that are often incompatible with anthropological, anatomical, and bioarcheological analyses requiring intact skeletal remains. The osseous labyrinth inside the petrous bone has been shown to yield higher amounts of endogenous DNA than any other skeletal element; however, accessing this labyrinth in cases of a complete or reconstructed skull involves causing major structural damage to the cranial vault or base. Here, we describe a novel cranial base drilling method (CBDM) for accessing the osseous labyrinth from the cranial base that prevents damaging the surrounding cranial features, making it highly complementary to morphological analyses...
June 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28623412/long-term-follow-up-after-endoscopic-trans-sphenoidal-surgery-or-initial-observation-in-clivus-chordomas
#11
Jon Ramm-Pettersen, Radek Frič, Jon Berg-Johnsen
BACKGROUND: Resection of clivus chordomas through extensive skull base approaches is associated with high mortality and morbidity even in experienced hands. We report our experience with endoscopic trans-sphenoidal surgery, or a "wait-and-scan" strategy in selected patients. METHOD: Ten patients were diagnosed with clivus chordomas during an 8-year period. Six patients underwent primary treatment with endoscopic trans-sphenoidal surgery, followed by adjuvant proton-beam therapy in three of these patients...
June 16, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28618799/biosonar-signal-propagation-in-the-harbor-porpoise-s-phocoena-phocoena-head-the-role-of-various-structures-in-the-formation-of-the-vertical-beam
#12
Chong Wei, Whitlow W L Au, Darlene R Ketten, Zhongchang Song, Yu Zhang
Harbor porpoises (Phocoena phocoena) use narrow band echolocation signals for detecting and locating prey and for spatial orientation. In this study, acoustic impedance values of tissues in the porpoise's head were calculated from computer tomography (CT) scan and the corresponding Hounsfield Units. A two-dimensional finite element model of the acoustic impedance was constructed based on CT scan data to simulate the acoustic propagation through the animal's head. The far field transmission beam pattern in the vertical plane and the waveforms of the receiving points around the forehead were compared with prior measurement results, the simulation results were qualitatively consistent with the measurement results...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28615985/treatment-of-movement-disorders-with-focused-ultrasound
#13
REVIEW
Paul S Fishman, Victor Frenkel
Although the use of ultrasound as a potential therapeutic modality in the brain has been under study for several decades, relatively few neuroscientists or neurologists are familiar with this technology. Stereotactic brain lesioning had been widely used as a treatment for medically refractory patients with essential tremor (ET), Parkinson disease (PD), and dystonia but has been largely replaced by deep brain stimulation (DBS) surgery, with advantages both in safety and efficacy. However, DBS is associated with complications including intracerebral hemorrhage, infection, and hardware malfunction...
2017: Journal of Central Nervous System Disease
https://www.readbyqxmd.com/read/28614531/alternative-option-for-osteogenesis-imperfecta-and-trigeminal-neuralgia
#14
Leonardo Gilmone Ruschel, Guilherme José Agnoletto, Sonival Cândido Hunhevicz, Daniel Benzecry de Almeida, Walter Oleschko Arruda
Osteogenesis imperfecta (OI) is a bone disorder that can lead to skull base deformities such as basilar invagination, which can cause compression of cranial nerves, including the trigeminal nerve. Trigeminal neuralgia in such cases remains a challenge, given distorted anatomy and deformities. We present an alternative option, consisting in cannulation of the foramen ovale and classical percutaneous treatment. Percutaneous balloon microcompression was performed in a 28 year-old woman with OI and severe trigeminal neuralgia using computed tomography (CT) and radiographic-guided cannulation of the Gasserian ganglion without neuronavigation or stereotactic devices...
April 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28614134/value-of-99mtc-mibi-spect-ct-parathyroid-imaging-and-ultrasonography-for-concomitant-thyroid-carcinoma
#15
Rui Guo, Jiqiu Wang, Min Zhang, Miao Zhang, Hongping Meng, Yifan Zhang, Biao Li
PURPOSE: We aimed to assess the frequency of carcinoma in cases with suspected parathyroid adenoma and test the value of Tc-methoxyisobutylisonitrile (Tc-MIBI) single-photon emission computed tomography/computed tomography (SPECT/CT) parathyroid imaging and neck ultrasonography in detecting concomitant thyroid carcinoma. PATIENTS AND METHODS: We enrolled 741 patients with clinically suspected parathyroid adenoma who underwent Tc-MIBI planer scans and SPECT/CT of the skull base, neck, and thorax; patients also underwent ultrasonography within 1 month before SPECT/CT...
June 13, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28611936/large-transcalvarial-meningioma-surgical-resection-aided-by-preoperative-embolization
#16
Ali S Haider, Haris Rana, Lyndon K Lee, Mrigank S Shail, Dean Leonard, Umair Khan, Richa Thakur, Tijani Osumah, Sam Finn, Kennith F Layton
Meningiomas are the most common type of primary brain tumors, accounting for about 30% of all brain tumors. Meningiomas originate from the meninges and can be associated with any part of the skull. Classification of meningiomas is based upon the World Health Organization (WHO) classification system and prognosis of meningiomas can be determined via histologic grading. Surgery is the gold standard treatment option for all types of meningiomas. Due to the high vascularity of some meningiomas, surgical resection can lead to certain complications including intraoperative blood loss and hemorrhage...
May 8, 2017: Curēus
https://www.readbyqxmd.com/read/28611422/bone-fusion-in-normal-and-pathological-development-is-constrained-by-the-network-architecture-of-the-human-skull
#17
Borja Esteve-Altava, Toni Vallès-Català, Roger Guimerà, Marta Sales-Pardo, Diego Rasskin-Gutman
Craniosynostosis, the premature fusion of cranial bones, affects the correct development of the skull producing morphological malformations in newborns. To assess the susceptibility of each craniofacial articulation to close prematurely, we used a network model of the skull to quantify the link reliability (an index based on stochastic block models and Bayesian inference) of each articulation. We show that, of the 93 human skull articulations at birth, the few articulations that are associated with non-syndromic craniosynostosis conditions have statistically significant lower reliability scores than the others...
June 13, 2017: Scientific Reports
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
#18
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/28609471/finite-element-analysis-of-6-large-pmma-skull-reconstructions-a-multi-criteria-evaluation-approach
#19
Angela Ridwan-Pramana, Petr Marcián, Libor Borák, Nathaniel Narra, Tymour Forouzanfar, Jan Wolff
In this study 6 pre-operative designs for PMMA based reconstructions of cranial defects were evaluated for their mechanical robustness using finite element modeling. Clinical experience and engineering principles were employed to create multiple plan options, which were subsequently computationally analyzed for mechanically relevant parameters under 50N loads: stress, strain and deformation in various components of the assembly. The factors assessed were: defect size, location and shape. The major variable in the cranioplasty assembly design was the arrangement of the fixation plates...
2017: PloS One
https://www.readbyqxmd.com/read/28607895/true-parapharyngeal-space-tumors-case-series-from-a-teaching-oncology-center
#20
Ajay Chanakya Vallabhaneni, Subramanyam Ganesh Mandakulutur, Srilahari Vallabhaneni, Amritha Prabha, Ravi Keerthi Banavara
The Parapharyngeal Space (PPS) tumors are rare tumors accounting for 0.5% of the tumors in head and neck region. A retrospective study conducted at Department of Surgical oncology, Vydehi institute of Medical Sciences & Research center, Bengaluru, between 2010 and 2015 identified nine cases treated for PPS tumors. Patients are diagnosed on the basis of clinical examination fine needle aspiration cytology and imaging and considered for excision by one of the varied surgical approaches {transoral(1), transcervical(4), transparotid(0), transcervical-transparotid(1), transmandibular(3) or intratemporal(0) approach}...
June 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
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