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Lateral skull base

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https://www.readbyqxmd.com/read/29325963/surgical-anatomy-of-the-eustachian-tube-for-endoscopic-transnasal-skull-base-surgery-a-cadaveric-and-radiological-study
#1
Noritaka Komune, Satoshi Matsuo, Koichi Miki, Yojiro Akagi, Ryota Kurogi, Koji Iihara, Takashi Nakagawa
OBJECTIVE: The endoscopic endonasal approach to the anatomically complex lateral skull base presents technical challenges. The use of the Eustachian tube as a landmark to identify the petrous internal carotid artery has recently been reported, and this study aims to define the anatomical relationship between the Eustachian tube and its surrounding structures using cadaveric dissection and radiologic analysis. METHODS: To clarify the relationship of the Eustachian tube with its surrounding structures, we performed endoscopic and microscopic dissection of four adult cadaveric heads, and analyzed computed topography scans from 20 patients...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29288394/endoscopic-transorbital-route-to-the-petrous-apex-a-feasibility-anatomic-study
#2
Alberto Di Somma, Norberto Andaluz, Luigi Maria Cavallo, Thomaz E Topczewski, Federico Frio, Rosa Maria Gerardi, Jose Pineda, Domenico Solari, Joaquim Enseñat, Alberto Prats-Galino, Paolo Cappabianca
BACKGROUND: While the subtemporal approach represents the surgical module milestone designed to reach the petrous apex, a novel ventral route, which is the superior eyelid endoscopic transorbital approach, has been proposed to access the skull base. Accordingly, we aimed to evaluate the feasibility of this route to the petrous apex, providing a qualitative and quantitative analysis of this relatively novel pathway. METHODS: Five human cadaveric heads were dissected at the Laboratory of Surgical NeuroAnatomy of the University of Barcelona...
December 29, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29285680/single-stage-total-resection-of-giant-dumbbell-shaped-hypoglossal-schwannoma-a-case-report
#3
Takuro Inoue, Yoichi Nonaka, Hisao Hirai, Ayako Shima, Fumio Suzuki, Masayuki Matsuda, Takanori Fukushima
Extensive large dumbbell-shaped hypoglossal schwannoma is extremely rare, and total resection is nearly impossible. We present a case of a 61-year-old male with a giant-size hypoglossal schwannoma with moderate tongue atrophy. The tumor extended from the enlarged hypoglossal canal to the brainstem intradurally and the high cervical region extradurally. Through the extreme lateral infrajugular transcondylar (ELITE) skull base approach, the tumor was totally removed in a single-stage operation. Single-stage total resection is feasible by an experienced skull base team utilizing transcondylar skull base techniques and high cervical dissection...
December 28, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29275554/-estimation-of-external-features-of-eyes-for-the-adult-male-of-han-nationality-in-northeast-china-based-on-the-characteristics-of-skull
#4
G Y Xu, L Tian, J H Zhang
OBJECTIVES: To explore the correlation between the imaging parameters of skull and the external features of eyes. METHODS: Positive images of the head face and the frontal and lateral X-ray films were obtained from 101 cases of adult males of the Han nationality aged from 20 to 40 years old in Northeast China. The face width (x₁), upper face width (x₂), biorbital width (x₃), all facial height (x₄), upper facial height (x₅), maximum breadth of skull (x₆), minimum breadth of frontal bone (x₇), orbital widthⅡ(x₈), anterior interorbital breadth (x₉), maximum height of skull (x₁₀), minimum width of nasal bone (x₁₁) and orbital height (x₁₂) were measured and the data were statistically analysed...
October 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29261688/a-new-tropical-oligocene-dolphin-from-monta%C3%A3-ita-ol%C3%A3-n-santa-elena-ecuador
#5
Yoshihiro Tanaka, Juan Abella, Gabriel Aguirre-Fernández, Maria Gregori, R Ewan Fordyce
A new small probable Oligocene dolphin from Ecuador represents a new genus and species, Urkudelphis chawpipacha. The new taxon is known from a single juvenile skull and earbones; it differs from other archaic dolphins in features including widely exposed frontals at the vertex, a dorsally wide open vomer at the mesorostral groove, and a strongly projected and pointed lateral tuberosity of the periotic. Phylogenetic analysis places it toward the base of the largely-extinct clade Platanistoidea. The fossil is one of a few records of tropical fossil dolphins...
2017: PloS One
https://www.readbyqxmd.com/read/29260392/nose-profile-morphology-and-accuracy-study-of-nose-profile-estimation-method-in-scottish-subadult-and-indonesian-adult-populations
#6
Erli Sarilita, Christopher Rynn, Peter A Mossey, Sue Black, Fahmi Oscandar
This study investigated nose profile morphology and its relationship to the skull in Scottish subadult and Indonesian adult populations, with the aim of improving the accuracy of forensic craniofacial reconstruction. Samples of 86 lateral head cephalograms from Dundee Dental School (mean age, 11.8 years) and 335 lateral head cephalograms from the Universitas Padjadjaran Dental Hospital, Bandung, Indonesia (mean age 24.2 years), were measured. The method of nose profile estimation based on skull morphology previously proposed by Rynn and colleagues in 2010 (FSMP 6:20-34) was tested in this study...
December 19, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29237926/endoscopic-approach-to-remove-intra-extracranial-tumors-in-various-skull-base-regions-10-year-experience-of-a-single-center
#7
Qiu-Hang Zhang, Zhen-Lin Wang, Hong-Chuan Guo, Feng Kong, Bo Yan, Ming-Chu Li, Ge Chen, Jian-Tao Liang, Yu-Hai Bao, Feng Ling
BACKGROUND: Some problems have been found in the usually adopted combined approach for the removal of intra-extracranial tumors in skull base. Herein, we described a pure endoscopic transnasal or transoral approach (ETA) for the removal of intra-extracranial tumors in various skull base regions. METHODS: Retrospectively, clinical data, major surgical complications, pre- and postoperative images, and follow-up information of a series of 85 patients with intra-extracranial tumors in various skull base regions who were treated by surgery via ETA in our skull base center during the past 10 years were reviewed and analyzed...
December 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29236649/deadly-sphenoid-fungus-isolated-sphenoid-invasive-fungal-rhinosinusitis-a-case-report
#8
Jason E Gilde, Christopher C Xiao, Victoria A Epstein, Jonathan Liang
INTRODUCTION: Acute invasive fungal rhinosinusitis (AIFRS) is a potentially fatal infection, usually affecting immunocompromised patients. Isolated sphenoid sinus involvement is rare and has been reported in only a few cases. We discuss the clinical characteristics, histopathologic features, and differential diagnosis of AIFRS of the sphenoid sinus. CASE PRESENTATION: A 57-year-old man with a history of refractory non-Hodgkin lymphoma and neutropenia presented with a 1-week duration of left-sided headache and ipsilateral cheek paresthesia...
2017: Permanente Journal
https://www.readbyqxmd.com/read/29209853/3d-endoscopic-ear-surgery-a-clinical-pilot-study
#9
Daniele Bernardeschi, Ghizlene Lahlou, Daniele De Seta, Francesca Yoshie Russo, Isabelle Mosnier, Olivier Sterkers
OBJECTIVE: To evaluate the feasibility and efficacy of a new high-resolution 3D endoscope in endoscopic ear and lateral skull base surgery. METHODS: Eight patients, five women and three men, were included in this clinical pilot prospective study. Their age was 38 ± 17.3 years (mean ± SD, range 17-54 years). The right side was involved in five cases, and the left side in three cases. There were three cases of chronic otitis, one case of cholesteatoma of the external auditory canal, one case of otosclerosis, one case of cochlear implant surgery, and two cases of stage 2 vestibular schwannoma operated on with a retrosigmoid approach to preserve hearing...
December 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29194713/intraspecific-variation-in-the-domestic-cat-bony-labyrinth-revealed-by-different-measurement-techniques
#10
Rico Schellhorn
The knowledge of intraspecific variation is important to make assumptions on an interspecific level. To study intraspecific variation in the bony labyrinth morphology of the domestic cat, eleven specimens of Felis silvestris catus and two additional subspecies (F. s. lybica, F. s. ornata) were investigated. The sample comprises skulls of adult males and females, as well as juvenile cats. Each bony labyrinth endocast was virtually reconstructed based on µCT scans. To estimate the radius of curvature of each inner ear semicircular canal, three different approaches were tested...
December 1, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29194275/preoperative-exposure-of-sigmoid-sinus-trajectory-in-posterolateral-cranial-base-approaches-using-a-new-landmark-through-a-neurosurgical-perspective
#11
Ihsan Doğan, Onur Özgüral, Ümit Eroğlu, Eyyub S M Al-Beyati, Cemil M Kilinç, Ayhan Cömert, Hasan Çağlar Uğur
The location of burr holes in posterolateral cranial base approaches should be appropriate to provide an adequate operative field, and surgical freedom is crucial for bone window opening. The aim of this study was to search for more convenient and easily detectable landmarks in comparison with current landmarks in posterolateral cranial base surgery. Twenty 3-dimensional reconstructed head and neck computed tomography angiography images (group 1) and 20 cadaver heads (group 2) were evaluated. An imaginary line connecting the angle of the mandible and the mastoid tip was extended upward...
November 20, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29194213/ollier-disease-of-the-lateral-skull-base
#12
Zachary C Fridirici, Jeffrey J Petrusek, Eric J Thorpe, John P Leonetti
No abstract text is available yet for this article.
November 29, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29187780/the-skull-of-epidolops-ameghinoi-from-the-early-eocene-itabora%C3%A3-fauna-southeastern-brazil-and-the-affinities-of-the-extinct-marsupialiform-order-polydolopimorphia
#13
Robin M D Beck
The skull of the polydolopimorphian marsupialiform Epidolops ameghinoi is described in detail for the first time, based on a single well-preserved cranium and associated left and right dentaries plus additional craniodental fragments, all from the early Eocene (53-50 million year old) Itaboraí fauna in southeastern Brazil. Notable craniodental features of E. ameghinoi include absence of a masseteric process, very small maxillopalatine fenestrae, a prominent pterygoid fossa enclosed laterally by a prominent ectopterygoid crest, an absent or tiny transverse canal foramen, a simple, planar glenoid fossa, and a postglenoid foramen that is immediately posterior to the postglenoid process...
2017: Journal of Mammalian Evolution
https://www.readbyqxmd.com/read/29173756/proton-therapy-for-head-and-neck-cancers
#14
REVIEW
Pierre Blanchard, Gary Brandon Gunn, Alexander Lin, Robert L Foote, Nancy Y Lee, Steven J Frank
Because of its sharp lateral penumbra and steep distal fall-off, proton therapy offers dosimetric advantages over photon therapy. In head and neck cancer, proton therapy has been used for decades in the treatment of skull-base tumors. In recent years the use of proton therapy has been extended to numerous other disease sites, including nasopharynx, oropharynx, nasal cavity and paranasal sinuses, periorbital tumors, skin, and salivary gland, or to reirradiation. The aim of this review is to present the physical properties and dosimetric benefit of proton therapy over advanced photon therapy; to summarize the clinical benefit described for each disease site; and to discuss issues of patient selection and cost-effectiveness...
January 2018: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/29170837/post-traumatic-carotid-cavernous-fistula-in-a-pediatric-patient-a-case-based-literature-review
#15
Barbara Albuquerque Morais, Vitor Nagai Yamaki, Jose Guilherme Mendes Pereira Caldas, Wellingson Silva Paiva, Hamilton Matushita, Manoel Jacobsen Teixeira
BACKGROUND: Carotid-cavernous fistula (CCF) is a shunt between the carotid artery and the cavernous sinus. Traumatic CCFs are diagnosed in 0.2% of head traumas being only 4.6% of the pediatric population. Classified by Barrow in 1985, type A CCF is the most frequent, occurring in 75% of cases. Type A is characterized by direct and high-flow CCF that generally can occur as a result of traumatic injury or rupture of an intracavernous aneurysm. CASE PRESENTATION: The subject was an 8-year-old boy with penetrating trauma to his left eye...
November 23, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29166425/anatomy-of-the-sphenopalatine-artery-and-its-implications-for-transnasal-neurosurgery
#16
M Eordogh, A Grimm, I Gawish, L Patonay, R Reisch, H R Briner, G Baksa
BACKGROUND: The knowledge of sinonasal vasculature is inevitable in transnasal neurosurgery. We performed an anatomical study on the sphenopalatine artery from the perspective of skull base procedures. METHODOLOGY: To analyse the anatomical landmarks of the sphenopalatine artery, arterial skull corrosion casts (26 head halves) underwent endoscopic transnasal phantom surgery. Furthermore, we performed microsurgical dissection on formaldehyde-fixated cadavers with arterial perfusion (14 head halves) as well as studied Cone Beam CT-scans of anonymised patients and cadavers (115 head sides)...
November 22, 2017: Rhinology
https://www.readbyqxmd.com/read/29152469/eyebrow-incision-for-surgical-evacuation-of-a-lobar-intracerebral-hematoma-with-a-novel-endoport-system
#17
Dale Ding, Colin J Przybylowski, Robert M Starke, R Webster Crowley, Kenneth C Liu
Large lobar intracerebral hemorrhages (ICHs) can cause rapid neurological deterioration, and affected patients have low rates of survival and functional independence. Currently, the role of surgical intervention in the management patients with lobar ICHs is controversial. Minimally invasive technologies have been developed which may potentially decrease the operative morbidity of ICH surgery. The aim of this case report is to describe the technical aspects of the use of a novel minimally invasive endoport system, the BrainPath (NICO, Indianapolis, IN, USA), through an eyebrow incision for evacuation of a large lobar hematoma...
June 2017: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/29135804/surgical-management-of-tumors-involving-meckel-s-cave-and-cavernous-sinus-role-of-an-extended-middle-fossa-and-lateral-sphenoidectomy-approach
#18
Daniel Q Sun, Arnold H Menezes, Matthew A Howard, Bruce J Gantz, David M Hasan, Marlan R Hansen
OBJECTIVE: To study the indications and outcomes of lateral sphenoidectomy as part of a combined skull base approach in the treatment of tumors involving Meckel's cave (MC) and cavernous sinus (CS). STUDY DESIGN: Retrospective patient series. SETTING: Tertiary referral center. PATIENTS: Twenty-two consecutive patients (mean age: 45 yr, range: 16-76) who underwent transzygomatic, extended middle fossa approaches for tumors involving MC and CS...
November 13, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29124088/considerations-and-code-for-partial-volume-correcting-18-f-av-1451-tau-pet-data
#19
Suzanne L Baker, Anne Maass, William J Jagust
[(18)F]-AV-1451 is a leading tracer used with positron emission tomography (PET) to quantify tau pathology. However, [(18)F]-AV-1451 shows "off target" or non-specific binding, which we define as binding of the tracer in unexpected areas unlikely to harbor aggregated tau based on autopsy literature [1]. Along with caudate, putamen, pallidum and thalamus non-specific binding [2], [3], we have found binding in the superior portion of the cerebellar gray matter, leading us to use inferior cerebellar gray as the reference region...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29094066/surgical-repair-of-spontaneous-cerebrospinal-fluid-csf-leaks-a-systematic-review
#20
REVIEW
Brian C Lobo, Maraya M Baumanis, Rick F Nelson
Objectives: To review the safety and efficacy of surgical management for spontaneous cerebrospinal fluid (CSF) leaks of the anterior and lateral skull base. Data Sources: A systematic review of English articles using MEDLINE. Review Methods: Search terms included spontaneous, CSF, cerebrospinal fluid, endoscopic, middle fossa, transmastoid, leak, rhinorrhea. Independent extraction of articles by 3 authors. Results: Patients with spontaneous CSF leaks are often obese (average BMI of 38 kg/m2) and female (72%)...
October 2017: Laryngoscope Investigative Otolaryngology
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