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E V Beliaeva, L V Lapshina, E V Shaposhnikova, A A Molgachev
Dandy-Walker malformation is a rare disease of the central nervous system pathology (congenital malformations of the fossa cranii posterior). The key features of this syndrome are an enlargement of the fourth ventricle; complete absence of the cerebellar vermis, the posterior midline area of cerebellar cortex responsible for coordination of the axial musculature; and cyst formation near the internal base of the skull. Pregnant patients with Dandy-Walker malformation are at high risk and are managed by multidisciplinary teams including neurologists and obstetricians...
2018: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Georgios Klironomos, Amir R Dehdashti
No abstract text is available yet for this article.
March 20, 2018: Acta Neurochirurgica
Yu Zhou, Zhenyu Zhou, Lifeng Liu, Xuecheng Cao
BACKGROUND: Skeletal and soft tissue damage are often associated with unilateral facet dislocations, which undoubtedly lead to instability of the spine and further increase difficulties in cervical reduction. This type of irreducible facet dislocation is usually accompanied with potential catastrophic consequences including neurological deficit and severe disability. Therefore, a consistent and evidence-based treatment plan is imperative. CASE PRESENTATION: The literature regarding the management of traumatic unilateral locked cervical facet dislocations was reviewed...
March 21, 2018: Journal of Medical Case Reports
Caitlin R Woolcott, Stephanie Torrey, Patricia V Turner, Lilia Serpa, Karen Schwean-Lardner, Tina M Widowski
On-farm euthanasia is a critical welfare issue in the poultry industry and can be particularly difficult to perform on mature turkeys due to their size. We evaluated the efficacy of two commercially available non-penetrating captive bolt devices, the Zephyr-EXL and the Turkey Euthanasia Device (TED), on 253 turkeys at three stages of production: 4-5, 10, and 15-20 weeks of age. Effectiveness of each device was measured using both ante- and post-mortem measures. Application of the Zephyr-EXL resulted in a greater success rate (immediate abolishment of brainstem reflexes) compared to the TED (97...
March 20, 2018: Animals: An Open Access Journal From MDPI
Patryk Zradziński
PURPOSE: In this work, the inter-person variability of hazards caused by a low frequency magnetic field exposure (of various polarisation and homogeneity near to the magneto therapy applicator) to users of BAHA hearing implants were investigated with respect to various head structures. MATERIAL AND METHODS: The effects of exposure were evaluated by numerical simulations of the electric field (Ein ) induced in head phantoms (regular or with implant model). Phantoms mimic head dimensions and thicknesses of layers of skin, fat, skull bones and brain...
March 20, 2018: International Journal of Radiation Biology
Elisa Vaiani, Cintia Morales, Florencia Soto, Yeny Blanco, Carlos Rugilo, Marta Ciaccio, Alicia Belgorosky
Giant prolactinomas are rare pituitary adenomas characterized by their great local invasion. In this paper, we report a 15-year-old male with left retro-ocular pain and ipsilateral exophthalmos of 4 months of evolution, secondary to a tumour in the base of the skull that invaded the orbit. Hormonal studies revealed serum prolactin of 6913,7 ng/ml (normal value < 20), confirming the diagnosis of giant prolactinoma. The patient started treatment with the dopaminergic agonist cabergoline in increasing doses...
April 1, 2018: Archivos Argentinos de Pediatría
Yoshitaka Inui, Takashi Ichihara, Masaki Uno, Masanobu Ishiguro, Kengo Ito, Katsuhiko Kato, Hajime Sakuma, Hidehiko Okazawa, Hiroshi Toyama
OBJECTIVE: Statistical image analysis of brain SPECT images has improved diagnostic accuracy for brain disorders. However, the results of statistical analysis vary depending on the institution even when they use a common normal database (NDB), due to different intrinsic spatial resolutions or correction methods. The present study aimed to evaluate the correction of spatial resolution differences between equipment and examine the differences in skull bone attenuation to construct a common NDB for use in multicenter settings...
March 19, 2018: Annals of Nuclear Medicine
Gesa Cohrs, Monika Huhndorf, Nils Niemczyk, Lukas J Volz, Alexander Bernsmeier, Ash Singhal, Naomi Larsen, Michael Synowitz, Friederike Knerlich-Lukoschus
PURPOSE: Magnetic resonance imaging (MRI) is a sensitive imaging tool which lacks the burden of ionizing radiation. It is not established as primary diagnostic tool in traumatic brain injury (TBI). The purpose of this study was to evaluate the usefulness of MRI as initial imaging modality in the emergency management of mild pediatric TBI. METHODS: Children (0-18 years, sub-divided in four age-groups) with mild TBI who received MRI in the emergency department were identified...
March 19, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Simone Langness, Erin Ward, Jonathan Halbach, Radhames Lizardo, Katherine Davenport, Stephen Bickler, Karen Kling, Hari Thangarajah, Julia Grabowski, Timothy Fairbanks
PURPOSE: Serum D-dimer has been proposed as a biomarker to aid in the diagnosis of pediatric traumatic brain injury (TBI). We investigated the accuracy of D-dimer in predicting the absence of TBI and evaluated the degree by which D-dimer could limit unnecessary computed tomography scans of the head (CTH). METHODS: Retrospective review of patients with suspected TBI from 2011 to 2013 who underwent evaluation with CTH and quantitative D-dimer. D-dimer levels were compared among patients with clinically-important TBI (ciTBI), TBI, isolated skull fracture and no injury...
April 2018: Journal of Pediatric Surgery
Alex H Wrede, Aarthy Shah, Marilyn C McNamara, Reza Montazami, Nicole N Hashemi
We report a study on two methods that enable spatial control and induced cavitation on targeted microbubbles (MBs). Cavitation is known to be present in many situations throughout nature. This phenomena has been proven to have the energy to erode alloys, like steel, in propellers and turbines. It is recently theorized that cavitation occurs inside the skull during a traumatic-brain injury (TBI) situation. Controlled cavitation methods could help better understand TBIs and explain how neurons respond at moments of trauma...
May 2018: Ultrasonics Sonochemistry
Ana Catarina Franco, Olympia Kremmyda, Jan Rémi, Soheyl Noachtar
OBJECTIVE: Positive interictal epileptiform discharges (IEDs) are rarely recorded from surface EEG, due to the orientation of the cortex and its neurons. Their frequency and significance in adults is unknown, and has only been studied as a phenomenon of the neonatal period and childhood. We aimed to evaluate the frequency and characteristics of positive epileptiform discharges in a large cohort of patients. METHODS: We retrospectively reviewed 24,178 reports from 18,060 patients of non-invasively recorded EEGs for various indications...
February 8, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Mathew Geltzeiler, Ana Carolina Igami Nakassa, Meghan Turner, Pradeep Setty, George Zenonos, Andrea Hebert, Eric Wang, Juan Fernandez-Miranda, Carl Snyderman, Paul Gardner
BACKGROUND: Vascularized intranasal flaps are the primary reconstructive option for endoscopic skull base defects. Flap vascularity may be compromised by injury to the pedicle or prior endonasal surgery. There is currently no validated technique for intraoperative evaluation of intranasal flap viability. OBJECTIVE: To evaluate the efficacy of indocyanine green (ICG) near-infrared angiography in predicting the viability of pedicled intranasal flaps during endoscopic skull base surgery through a pilot study...
March 14, 2018: Operative Neurosurgery (Hagerstown, Md.)
Lucas R Philipp, Mark R Witcher, Robert E Gross
INTRODUCTION: The Responsive Neurostimulation System (RNS, Neuropace, Mountain View, California) has been proven to be effective at reducing seizures in patients with partial-onset epilepsy. The system incorporates a skull-mounted neurostimulator that requires a cranial incision for replacement. Although integral to the functioning of the system, in some circumstances, such as in the setting of infection, this can be disadvantageous. At present, there are no alternatives to cranial implantation of the RNS System...
March 14, 2018: Operative Neurosurgery (Hagerstown, Md.)
Samuel D Clark, Rachel Mikofsky, Jacqueline Lawson, David Sulzer
Multiphoton microscopy has been widely adapted for imaging neurons in vivo. Repeated imaging requires implantation of a cranial window or repeated thinning of the skull. Cranial window surgery is typically performed with a high speed rotary drill, and many investigators find it challenging to prevent the drill from damaging the delicate dura and blood vessels. Extensive training and practice is required to remove the bone without damage to underlying tissue and thus cranial window surgery can be difficult, time consuming, and produce tissue damage...
March 2, 2018: Journal of Visualized Experiments: JoVE
Abhilasha Siyag, Tej P Soni, Anil K Gupta, Lalit M Sharma, Naresh Jakhotia, Shantanu Sharma
Plasmacytoma of the skull-base is a rare entity. Differential diagnosis includes chordoma, osteosarcoma, carcinoma nasopharynx, meningioma, metastatic carcinoma, lymphoma, and multiple myeloma. Accurate and precise diagnosis is extremely important for plasmacytoma of the skull-base as its treatment and prognosis is different from other skull-base lesions. A 41-year-old man presented with concerns of headache, diplopia, and left eye strabismus. A magnetic resonance image (MRI) of his brain showed a large expansile mass measuring 51 mm involving the clivus and central skull-base...
January 15, 2018: Curēus
Muhammad Sohail Umerani, Hira Burhan, Salman Sharif, Tauqir Ul Islam, Mehak Hafiz Ghaziani
Orbital roof defects are rare congenital osseous abnormalities that cause protrusion of intracranial contents into the orbit, resulting in a condition known as the orbital meningoencephalocele, a rare cause of pulsatile proptosis. We present a case of a 25-year-old lady, presented to us with complaints of left frontal headache, left eye protrusion and double vision from the left eye for the past three months. Her higher mental functions were intact. Local examination revealed non-axial pulsatile proptosis and an outward depression of the left eyeball along with diplopia...
January 15, 2018: Curēus
Riccardo Draghi, Giovanna Mantovani, Letterio Runza, Giorgio Carrabba, Nicola Fusco, Paolo Rampini, Antonella Costa, Marco Locatelli
The authors present an unusual case of a patient suffering from visual deficit due to pituitary granulomatosis with polyangiitis (GPA) associated with Rathke's cleft cyst (RCC). The patient was referred to our Neurosurgery Department presenting right eye amaurosis, third cranial nerve palsy, and left temporal hemianopsia. Magnetic resonance imaging documented a sellar or suprasellar lesion with solid and cystic components. The dura mater of the skull base was also strongly enhanced. The patient underwent surgery...
February 2018: Radiology Case Reports
Joseph Y Shen, Neal D Futran, Maya G Sardesai
Craniofacial Actinomyces osteomyelitis progression is rare, as patients are soon treated. A 56-year-old male smoker presented with sinusitis and was managed medically. This patient failed to follow up and presented 1 year later with erosive bony disease. He was managed medically and surgically; however, his disease evolved to include his midface, skull base, and cranium. He underwent staged debridement and free tissue reconstruction. His disease is controlled but not cured. The literature includes case reports and small series describing limited disease treated successfully with surgical and medical management...
February 2018: Radiology Case Reports
John J Cawley, Jürgen Kriwet
A new pycnodont fish from the early-mid Cenomanian, Late Cretaceous, of the 'Ein Yabrud quarry near the village of Beit Eil in Israel is the first pycnodont fish to be described from this locality. Due to the locality where it was found, Scalacurvithys naishi gen. et sp. nov. is considered an inhabitant of reefal waters interspersed with lagoons in the eastern Tethys Sea. Scalacurvichthys naishi is notable for its protruding, hook-shaped first dorsal ridge scale above a large triangular dermatocranium, a deeply sloped and antero-posteriorly shortened skull and bifurcated cloacal scales...
2018: Journal of Systematic Palaeontology
Ciro A Vasquez, John Thompson, A Samy Youssef
BACKGROUND: Skull base surgeons have adopted splitting the tentorium in order to expand the exposure, minimize brain retraction and combine the supra and infratentorial compartments for resection of large skull base lesions. OBJECTIVE: To describe stepwise techniques for splitting the tentorium to access deeply located skull base lesions and morphometrically assess the gained exposure. METHODS: Surgical exposure was performed through a transylvian, subtemporal, posterior transpetrosal and combined posterior supra/infratentorial - trans-sinus approach...
March 15, 2018: World Neurosurgery
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