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https://www.readbyqxmd.com/read/27933634/middle-cranial-fossa-approach-to-repair-tegmen-defects-assisted-by-three-dimensionally-printed-temporal-bone-models
#1
Sameer Ahmed, Kyle K VanKoevering, Stephanie Kline, Glenn E Green, H Alexander Arts
OBJECTIVES/HYPOTHESIS: To explore the perioperative utility of three-dimensionally (3D)-printed temporal bone models of patients undergoing repair of lateral skull base defects and spontaneous cerebrospinal fluid leaks with the middle cranial fossa approach. STUDY DESIGN: Case series. METHODS: 3D-printed temporal bone models-based on patient-specific, high-resolution computed tomographic imaging-were constructed using inexpensive polymer materials...
December 9, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27932510/embolization-of-intracranial-dural-arteriovenous-fistulas-using-phil-liquid-embolic-agent-in-26-patients-a-multicenter-study
#2
S Lamin, H S Chew, S Chavda, A Thomas, M Piano, L Quilici, G Pero, M Holtmannspolter, M E Cronqvist, A Casasco, L Guimaraens, L Paul, A Gil Garcia, A Aleu, R Chapot
BACKGROUND AND PURPOSE: The introduction of liquid embolic agents has revolutionized endovascular approach to cranial vascular malformations. The aim of the study was to retrospectively assess the efficacy and safety of Precipitating Hydrophobic Injectable Liquid (PHIL), a new nonadhesive liquid embolic agent, in the treatment of patients with cranial dural arteriovenous fistulas. The primary end point was the rate of complete occlusion of dural arteriovenous fistulas. Secondary end points included the incidence of adverse events and clinical status at 3-month follow-up...
December 8, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27931523/a-blue-middle-ear-mass-cholesterol-granuloma-mimicking-a-glomus-tumor-and-endolymphatic-sac-tumor
#3
Clara Olcott, Barry Strasnick
Cholesterol granuloma (CG) is the most common benign lesion of the petrous apex, however, it can grow significantly large and become destructive causing a diagnostic dilemma. This case presents a 25-year-old female with 2-year history of left-sided progressive and profound hearing loss, a transient left-sided facial paralysis and cranial nerve 10 palsy who presented with a blue middle ear mass. Her diagnosis did not become apparent until direct visualization intraoperatively. The objective of this case study is to highlight the destructive capabilities of CG and the importance to keep it in the differential diagnosis of a large, erosive, expansile skull base lesion in order to avoid overly aggressive resection or other unnecessary treatment...
January 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27930822/estimating-effects-of-craniofacial-morphology-on-gingival-recession-and-clinical-attachment-loss
#4
Loutfi Salti, Birte Holtfreter, Christiane Pink, Mohamad Habes, Reiner Biffar, Stavros Kiliaridis, Karl-Friedrich Krey, Robin Bülow, Henry Völzke, Thomas Kocher, Amro Daboul
OBJECTIVES: Evidence on possible associations between facial morphology, attachment loss and gingival recession is lacking. We analyzed whether the facial type, which can be described by the ratio of facial width and length (facial index), is related to periodontal loss of attachment, hypothesizing that a broad face might be associated with less gingival recession (GR) and less clinical attachment loss (CAL) than a long face. MATERIALS AND METHODS: Data from the 11-years follow-up of the population-based Study of Health in Pomerania were used...
December 8, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27929602/facial-reanimation-according-to-the-postresection-defect-during-lateral-skull-base-surgery
#5
John P Leonetti, Sahar Nadimi, Sam J Marzo, Douglas Anderson, Darl Vandevender
The vast majority of benign tumors of the cerebellopontine angle, temporal bone, and parotid gland can be successfully resected without permanent injury to the facial nerve. Malignant tumors or recurrent disease may require facial nerve sacrifice, especially if preoperative facial paresis is present. This article will present case examples of the various methods to reconstruct facial animation after lateral skull base resections that require sacrifice of cranial nerve VII, and the associated mimetic facial musculature...
December 2016: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/27929599/surgical-management-of-parapharyngeal-space-tumors-the-role-of-cervical-and-lateral-skull-base-approaches
#6
Arturo Mario Poletti, Siba P Dubey, Giovanni Colombo, Giovanni Cugini
We conducted a retrospective study to analyze the role of the cervical and lateral skull base approaches in the surgical excision of parapharyngeal space (PPS) tumors. Our study population was made up of 34 patients-15 males and 19 females, aged 13 to 73 years (mean: 50.6)-who had presented to us with a PPS tumor during a 9-year period. The 34 cases included 23 benign tumors and 11 malignancies. The 23 benign tumors consisted of 11 pleomorphic adenomas, 5 schwannomas, 2 paragangliomas, 2 Warthin tumors, 1 oncocytoma, 1 hamartoma, and 1 osteochondroma...
December 2016: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/27920856/tongue-base-schwannoma-differential-diagnosis-and-imaging-features-with-a-case-presentation
#7
Zain Badar, Zerwa Farooq, Daniel Zaccarini, Sajeev R Ezhapilli
Schwannomas are slow growing, encapsulated neoplasms that arise from the nerve sheath. A vast majority of these benign neoplasms occur in the head and neck region, most commonly involving the 8th cranial nerve. Schwannomas arising from the base of tongue are very rare and, thus, can easily escape the list of differential diagnosis for a posterior tongue mass. A systematic approach is recommended for diagnosis of a posterior tongue mass, with neoplastic, infectious, and congenital categories. We report a case of a 24-year-old female, who presented with pressure sensation in the throat...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27919116/stylohyoid-complex-eagle-syndrome-starting-in-a-9-year-old-boy
#8
Maite Gárriz-Luis, Pablo Irimia, Juan M Alcalde, Pablo Domínguez, Juan Narbona
Background There are only four previous pediatric reports of the glossopharyngeal neuralgic form of the stylohyoid complex syndrome. Stylohyoid complex has merely been described as cases of glossopharyngeal neuralgia in children. Case Report A 12-year-old boy came to our hospital because of recurrent episodes of severe cranial pain (9/10) lasting for 5 to 15 minutes. Pain affected the right tonsillar fossa, ear, and mastoid region. Since the start at the age of 9 years, the frequency of painful episodes has progressively increased: when admitted to our clinics 3 years later, the child was having up to five episodes daily in spite of analgesic, antiepileptic, and antidepressant drugs; he had abandoned school and leisure...
December 5, 2016: Neuropediatrics
https://www.readbyqxmd.com/read/27918153/enlargement-of-meckel-s-cave-in-patients-with-spontaneous-cerebrospinal-fluid-leaks
#9
Geoffrey P Aaron, Elisa Illing, Zachary Lambertsen, Miles Ritter, Erik H Middlebrooks, Joel Cure, Do-Yeon Cho, Kristen O Riley, Bradford A Woodworth
BACKGROUND: Spontaneous cerebrospinal fluid (CSF) leaks have imaging findings consistent with chronically elevated intracranial pressure, such as empty sella. Meckel's cave is a CSF-filled space that houses the trigeminal ganglion at the cranial base. Our objective in this study was to evaluate "dilated" Meckel's cave as a radiologic sign in patients with elevated intracranial pressure spontaneous CSF leaks and compare the dimensions with those from a control cohort. METHODS: Meckel's cave dimensions were measured in patients with spontaneous CSF leaks and documented elevated intracranial pressure...
December 5, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27917338/six-different-extremely-calcified-lesions-of-the-brain-brain-stones
#10
Yurdal Gezercan, Vedat Acik, Gökhan Çavuş, Ali Ihsan Ökten, Emre Bilgin, Hakan Millet, Burak Olmaz
BACKGROUND: This study aimed to extend clinical documentation of cerebral calculi by reporting six cases of cerebral calculi with distinct etiologies and localizations. METHODS: We evaluated the age, sex distribution, presenting symptoms, neurological examination findings, pathology results, and location of the calcifications of six patients with intracranial calcifications. RESULTS: Three of the six patients with brain stones were female (50%), and three were male (50%)...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27915104/petroclival-meningiomas-remaining-controversies-in-light-of-minimally-invasive-approaches
#11
REVIEW
Sâmia Yasin Wayhs, Guilherme Alves Lepski, Leonardo Frighetto, Gustavo Rassier Isolan
Surgical resection of petroclival meningiomas remains challenging due to their deep location and relationship to vital neurovascular structures. Although the natural history of these tumors involves a slow course, the incidence of cranial nerve deficits and the extent of tumor resection vary widely in the literature. Some reviews on this topic have been conducted, but data remain fragmentary and based on retrospective case series, which hinders attempts at meta-analysis. Within this context, research into the use of minimally invasive approaches, including in neuroendoscopy, continues to emerge...
November 29, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27915065/assessment-of-white-matter-transgression-during-neuroendoscopic-procedures-using-dti-fiber-tracking
#12
Sergio García, Jordina Rincon-Torroella, Arnau Benet, Laura Oleaga, José Juan González Sánchez
BACKGROUND: Presurgical planning allows anticipating intraoperative difficulties, increasing efficiency, and reducing risks. Neuroendoscopy is a minimally invasive technique whose related complications have been focused on cortical function and surface vessels injury. However, white matter disruption has been insufficiently acknowledged. OBJECTIVE: To present a new surgical planning method based on diffusion tensor image that allows quantifying subcortical transgression and optimizing neuroendoscopic trajectories...
November 30, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27914998/mathematical-model-in-post-mortem-estimation-of-brain-edema-using-morphometric-parameters
#13
Nemanja Radojevic, Bojana Radnic, Jelena Vucinic, Dragana Cukic, Ranko Lazovic, Bogdan Asanin, Slobodan Savic
Current autopsy principles for evaluating the existence of brain edema are based on a macroscopic subjective assessment performed by pathologists. The gold standard is a time-consuming histological verification of the presence of the edema. By measuring the diameters of the cranial cavity, as individually determined morphometric parameters, a mathematical model for rapid evaluation of brain edema was created, based on the brain weight measured during the autopsy. A cohort study was performed on 110 subjects, divided into two groups according to the histological presence or absence of (the - deleted from the text) brain edema...
November 27, 2016: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/27906065/dystrophin-deficient-dogs-with-reduced-myostatin-have-unequal-muscle-growth-and-greater-joint-contractures
#14
Joe N Kornegay, Daniel J Bogan, Janet R Bogan, Jennifer L Dow, Jiahui Wang, Zheng Fan, Naili Liu, Leigh C Warsing, Robert W Grange, Mihye Ahn, Cynthia J Balog-Alvarez, Steven W Cotten, Monte S Willis, Candice Brinkmeyer-Langford, Hongtu Zhu, Joe Palandra, Carl A Morris, Martin A Styner, Kathryn R Wagner
BACKGROUND: Myostatin (Mstn) is a negative regulator of muscle growth whose inhibition promotes muscle growth and regeneration. Dystrophin-deficient mdx mice in which myostatin is knocked out or inhibited postnatally have a less severe phenotype with greater total mass and strength and less fibrosis and fatty replacement of muscles than mdx mice with wild-type myostatin expression. Dogs with golden retriever muscular dystrophy (GRMD) have previously been noted to have increased muscle mass and reduced fibrosis after systemic postnatal myostatin inhibition...
April 4, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27905031/modern-approaches-to-studies-of-new-osteogenic-biomaterials-on-the-model-of-regeneration-of-critical-size-cranial-defects-in-rats
#15
M S Bartov, A V Gromov, M S Poponova, D M Savina, K E Nikitin, T M Grunina, V N Manskikh, O A Gra, V G Lunin, A S Karyagina, A L Gintsburg
Osteoinductive characteristics of new osteoplastic materials based on demineralized bone matrix of xenogenic origin with high and controlled degree of purification were studied on the model of regeneration of critical-size cranial defects in rats using modern approaches, including histological analysis, evaluation of morphological parameters of the bone tissue obtained by micro-computed tomography, and estimation of bone tissue growth rate using in vivo fluorochrome label. Demineralized bone matrix and, to a much greater extent, its activated form containing modified recombinant growth factor rhBMP-2 with high content of the dimeric form exhibited osteoinductive activity...
December 1, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27903844/therapeutic-approaches-to-pediatric-pseudotumor-cerebri-new-insights-from-literature-data
#16
Giovanna Vitaliti, Piero Pavone, Nassim Matin, Omidreza Tabatabaie, Salvatore Cocuzza, Michele Vecchio, Luigi Maiolino, Paola Di Mauro, Angelo Conti, Riccardo Lubrano, Agostino Serra, Raffaele Falsaperla
The pseudotumor cerebri syndrome (PTCS), also known as idiopathic intracranial hypertension (IIH), is characterized by signs and symptoms of increased intracranial pressure such as headache and cranial nerve palsies, in the absence of any space-occupying mass. This condition commonly affects overweight women of childbearing age, even if it is also frequent in men and children. Children with PTCS may present with atypical signs and symptoms, with a different prognosis compared to adults. However, the treatment is the same for both children and adults, even if there are no strict treatment guidelines in regards...
November 30, 2016: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/27903188/the-role-of-diffusion-tensor-imaging-tractography-for-gamma-knife-thalamotomy-planning
#17
João Gabriel Ribeiro Gomes, Alessandra Augusta Gorgulho, Amanda de Oliveira López, Crystian Wilian Chagas Saraiva, Lucas Petri Damiani, Anderson Martins Pássaro, João Victor Salvajoli, Ludmila de Oliveira Siqueira, Bernardo Peres Salvajoli, Antônio Afonso Ferreira De Salles
OBJECTIVE The role of tractography in Gamma Knife thalamotomy (GK-T) planning is still unclear. Pyramidal tractography might reduce the risk of radiation injury to the pyramidal tract and reduce motor complications. METHODS In this study, the ventralis intermedius nucleus (VIM) targets of 20 patients were bilaterally defined using Iplannet Stereotaxy Software, according to the anterior commissure-posterior commissure (AC-PC) line and considering the localization of the pyramidal tract. The 40 targets and tractography were transferred as objects to the GammaPlan Treatment Planning System (GP-TPS)...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27903119/the-learning-curve-in-endoscopic-endonasal-resection-of-craniopharyngiomas
#18
Varun R Kshettry, Hyunwoo Do, Khaled Elshazly, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
OBJECTIVE There is a paucity of literature regarding the learning curve associated with performing endoscopic endonasal cranial base surgery. The purpose of this study was to determine to what extent a learning curve might exist for endoscopic endonasal resection in cases of craniopharyngiomas. METHODS A retrospective review was performed for all endoscopic endonasal craniopharyngioma resections performed at Thomas Jefferson University from 2005 to 2015. To assess for a learning curve effect, patients were divided into an early cohort (2005-2009, n = 20) and a late cohort (2010-2015, n = 23)...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27903113/microscopic-versus-endoscopic-approaches-for-craniopharyngiomas-choosing-the-optimal-surgical-corridor-for-maximizing-extent-of-resection-and-complication-avoidance-using-a-personalized-tailored-approach
#19
James K Liu, Ilesha A Sevak, Peter W Carmel, Jean Anderson Eloy
Resection remains the mainstay of treatment for craniopharyngiomas with the goal of radical resection, if safely possible, to minimize the rate of recurrence. Endoscopic endonasal and microscopic transcranial surgical approaches have both become standard methods for the treatment for craniopharyngiomas. However, the approach selection paradigm for craniopharyngiomas is still a point of discussion. Choosing the optimal surgical approach can play a significant role in maximizing the extent of resection and surgical outcome while minimizing the risks of potential complications...
December 2016: Neurosurgical Focus
https://www.readbyqxmd.com/read/27900232/vanishing-pituitary-macroadenoma-a-case-report
#20
Emily P Sieg, Hayk Stepanyan, Russell Payne, Tao Ouyang, Brad E Zacharia
Pituitary macroadenomas are the most common suprasellar lesions in adults and are typically managed surgically through transsphenoidal resection when symptomatic. Due to their close proximity to the optic chiasm, pituitary macroadenomas often present with signs of bitemporal hemianopsia. Alternatively, these tumors can cause mass effect, thus presenting with signs of elevated intracranial pressure or can present with signs and symptoms of endocrine dysfunction. Here, we discuss a 55-year-old male diagnosed with a non-functioning pituitary macroadenoma (NFPA) based on cranial imaging, ophthalmologic exam, and endocrine evaluation...
October 20, 2016: Curēus
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