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https://www.readbyqxmd.com/read/28425611/a-simple-assessment-tool-for-evaluation-of-cadaveric-temporal-bone-dissection
#1
Sarah E Mowry, Erika Woodson, Samuel Gubbels, Matt Carfrae, Marlan R Hansen
EDUCATIONAL OBJECTIVE: Objective metrics in skilled-based educational courses allow trainees and instructors to assess performance and monitor progress. The objective is to validate a concise, easy-to-use instrument for assessment of resident skill during a timed cadaveric temporal-bone (CTB) dissection. STUDY DESIGN: Retrospective analysis. METHODS: An instrument was developed to assess resident performance on a yearly timed microdissection of CTB...
April 20, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28423968/penetrating-brain-injury-with-a-metal-bar-and-a-knife-report-of-two-interesting-cases
#2
Alireza Tabibkhooei, Morteza Taheri, Sadra Rohani, Iran Chanideh, Hessam Rahatlou
Introduction Penetrating brain injury (PBI) is uncommon among the civilian population. Here, we report two interesting cases of PBI. Case presentation The first patient was a 20-year-old male who sustained a penetrating head injury with a metal bar during an accident at work. The patient underwent early surgical intervention, and related meningitis was treated with antibiotics. The patient was discharged 45 days later with no deficit. The second patient was a 34-year-old male who was the victim of a violence attack and was admitted to hospital...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28421875/three-dimensional-printing-and-its-applications-in-otorhinolaryngology-head-and-neck-surgery
#3
Trevor D Crafts, Susan E Ellsperman, Todd J Wannemuehler, Travis D Bellicchi, Taha Z Shipchandler, Avinash V Mantravadi
Objective Three-dimensional (3D)-printing technology is being employed in a variety of medical and surgical specialties to improve patient care and advance resident physician training. As the costs of implementing 3D printing have declined, the use of this technology has expanded, especially within surgical specialties. This article explores the types of 3D printing available, highlights the benefits and drawbacks of each methodology, provides examples of how 3D printing has been applied within the field of otolaryngology-head and neck surgery, discusses future innovations, and explores the financial impact of these advances...
November 1, 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28420248/creating-an-optimal-3d-printed-model-for-temporal-bone-dissection-training
#4
Kuniyuki Takahashi, Yuka Morita, Shinsuke Ohshima, Shuji Izumi, Yamato Kubota, Yutaka Yamamoto, Sugata Takahashi, Arata Horii
OBJECTIVE: Making a 3-dimensional (3D) temporal bone model is simple using a plaster powder bed and an inkjet printer. However, it is difficult to reproduce air-containing spaces and precise middle ear structures. The objective of this study was to overcome these problems and create a temporal bone model that would be useful both as a training tool and for preoperative simulation. METHODS: Drainage holes were made to remove excess materials from air-containing spaces, ossicle ligaments were manually changed to bony structures, and small and/or soft tissue structures were colored differently while designing the 3D models...
April 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28420022/-severe-bleeding-from-the-middle-ear-cavity-after-myringotomy-review-based-on-a-case-report
#5
Veit M Hofmann, Stefan M Niehues, Andreas E Albers, Annett Pudszuhn
Report of a rare case of severe bleeding from the middle ear cavity after myringotomy. On the basis of the case report, the procedure for such bleeding is discussed in the context of the literature. A 6-year-old boy received a revision myringotomy in an ambulant setting. During the procedure a severe bleeding occurred. The external auditory canal was adequately packed. The patient was extubated and transferred to the clinic as an emergency. Computer tomography of the temporal bone showed the anatomical variant of a dehiscent high jugular bulb, which had been injured...
March 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28418754/evaluating-the-effect-of-virtual-reality-temporal-bone-simulation-on-mastoidectomy-performance-a-meta-analysis
#6
Justin T Lui, Monica Y Hoy
Background The increasing prevalence of virtual reality simulation in temporal bone surgery warrants an investigation to assess training effectiveness. Objectives To determine if temporal bone simulator use improves mastoidectomy performance. Data Sources Ovid Medline, Embase, and PubMed databases were systematically searched per the PRISMA guidelines. Review Methods Inclusion criteria were peer-reviewed publications that utilized quantitative data of mastoidectomy performance following the use of a temporal bone simulator...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28414141/temporal-role-of-macrophages-in-cancellous-bone-healing
#7
Olof Helge Sandberg, Love Tätting, Magnus Erik Bernhardsson, Per Aspenberg
Macrophages are important phagocytosing and cytokine producing cells with effects on fracture healing. We used clodronate-containing liposomes to reduce the number of macrophages, in order to study their role in the early phases of cancellous bone healing. Holes were drilled bilaterally into the cancellous bone of the proximal metaphysis of the tibia of 60 mice. A screw was inserted in the hole in the right tibia. The day of surgery was day 0. Clodronate-containing liposomes were injected intraperitoneally as a single injection either day -4 or -1 (before surgery) or day 1 or 3 (after surgery)...
April 14, 2017: Bone
https://www.readbyqxmd.com/read/28413546/solitary-plasmacytoma-of-temporal-bone-a-rare-case-report
#8
Ritesh Kumar, Narendra Kumar, Sandeep Mohindro, B D Radotra
Solitary plasmacytoma of base of skull is a rare disease. It presents with headache, swelling, and other vague symptoms. Systemic work-up to rule out multiple myeloma is necessary. Radiotherapy is the treatment of choice. We, here, present a case of solitary plasmacytoma of base of skull in right temporal bone in a 50-year-old female treated with surgery and radiotherapy.
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28413541/clival-giant-cell-tumor-a-rare-case-report-and-review-of-literature-with-respect-to-current-line-of-management
#9
Mohana Rao Patibandla, Amit Kumar Thotakura, Marabathina Nageswara Rao, Gokul Chowdary Addagada, Manisha Chowdary Nukavarapu, Manas Kumar Panigrahi, Shantiveer Uppin, Sundaram Challa, Srinivas Dandamudi
Giant-cell tumor (GCT) involving the skull base is rare. Sphenoid bone is the most commonly involved bone followed by petrous temporal bone. Histopathology and radiological features of these lesions are similar to GCT involving bone elsewhere. Unlike other sites, skull base is not an ideal site for the radical surgery. Hence adjuvant treatment has pivotal role. Radiation therapy with intensity-modulated radiation therapy, stereotactic radiosurgery or chemotherapy with adriamycin are promising as described in some case reports...
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28413076/detection-of-endolymphatic-hydrops-using-traditional-mr-imaging-sequences
#10
John H Keller, Barry E Hirsch, Ryan S Marovich, Barton F Branstetter
PURPOSE: The purpose of this study was to determine whether Meniere's disease (MD) produces endolymphatic cavity size changes that are detectable using unenhanced high-resolution T2-weighted MRI. MATERIALS & METHODS: This retrospective case-control study included patients with documented MD who had a high-resolution T2-weighted or steady-state free procession MRI of the temporal bones within one month of diagnosis, between 2002 and 2015. Patients were compared to age- and sex- matched controls...
April 6, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28411965/dynamic-cerebral-autoregulation-assessment-using-extracranial-internal-carotid-artery-doppler-ultrasonography
#11
Nai-Fang Chi, Hsiao-Lun Ku, Chen-Yen Wang, Yanhui Liu, Lung Chan, Ying-Chin Lin, Chung-Kang Peng, Vera Novak, Han-Hwa Hu, Chaur-Jong Hu
Transcranial Doppler ultrasonography of the middle cerebral artery (MCA) is frequently used to assess dynamic cerebral autoregulation (dCA); however, this is difficult in patients with poor temporal bone windows. In the study described here, we investigated the agreement and sensitivity of dCA indices determined from the extracranial internal carotid artery (ICA) and those determined from the MCA. Measurements for 32 stroke patients and 59 controls were analyzed. Measurement of the mean flow correlation index (Mx) and transfer function analysis based on spontaneous blood pressure fluctuation were simultaneously performed for the extracranial ICA and MCA...
April 12, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28409229/sphenoid-dysplasia-in-neurofibromatosis-type-1-a-new-technique-for-repair
#12
Di Rocco Concezio, Samii Amir, Tamburrini Gianpiero, Massimi Luca, Giordano Mario
PURPOSE: Sphenoid bone dysplasia in neurofibromatosis type 1 is characterized by progressive exophthalmos and facial disfiguration secondary to herniation of meningeal and cerebral structures. We describe a technique for reconstruction of the sphenoid defect apt at preventing or correcting the ocular globe dislocation. METHODS: After placement of spinal cerebrospinal fluid drainage to reduce intracranial pressure, the temporal pole is posteriorly dislocated extradurally...
April 13, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28407267/orangutans-enamel-defects-and-developmental-health-a-comparison-of-borneo-and-sumatra
#13
Mark F Skinner, Matthew M Skinner
Orangutans (Pongo sp.) show among the highest occurrence of three types of developmental enamel defect. Two are attributed to nutritional factors that reduce bone growth in the infant's face early in development. Their timing and prevalence indicate that Sumatra provides a better habitat than does Borneo. The third type, repetitive linear enamel hypoplasia (rLEH) is very common but its etiology is not understood. Our objective is to draw attention to this enigmatic, episodic stressor in the lives of orangutans...
April 13, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28397274/does-incidental-mastoid-opacification-on-computerized-tomography-necessitate-referral-to-ent
#14
Sophie L Wilkinson, Raguwinder S Sahota, James D Constable, Frazer Harper, Owen Judd
OBJECTIVE: The prevalence of incidental temporal bone disease on magnetic resonance imaging has been widely reported in the medical literature. Despite this, there currently is little evidence regarding incidental otological disease on computerized tomography (CT). Thus, the study aimed to review the CT prevalence of asymptomatic adult ear disease and evaluate the appropriateness of ear, nose, and throat (ENT) referral following its discovery. STUDY DESIGN: Retrospective observational study of 468 CT scans...
April 11, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28397137/fluorescence-guided-resection-of-extracranial-soft-tissue-tumour-infiltration-in-atypical-meningioma
#15
Florian Scheichel, Karl Ungersboeck, Melitta Kitzwoegerer, Franz Marhold
The exact role of 5-aminolevulinic acid (5-ALA) fluorescence-guided meningioma resection is as yet unclear. Although most of the meningiomas show positive fluorescence, the influence on outcome, fluorescence heterogeneity within the tumour, the correlation between fluorescence and the proliferation rate, as well as different quantitative measurements are a matter of debate. Positive fluorescence in bone infiltrative meningiomas is well described, whereas little data exist about 5-ALA fluorescence within soft tissue infiltration...
April 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28396758/use-of-denosumab-in-recurrent-chondroblastoma-of-the-squamous-temporal-bone-a-case-report
#16
Nicholas Calvert, David Wood
Chondroblastoma is a rare, benign bone tumor that represents 1-2% of all primary bone tumors. Denosumab, a monoclonal antibody, has been demonstrated to inhibit the growth of giant cell tumors. We report a case of recurrent chondroblastoma of the squamous temporal bone that is currently suppressed with denosumab.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28394900/acute-development-of-cortical-porosity-and-endosteal-na%C3%A3-ve-bone-formation-from-the-daily-but-not-weekly-short-term-administration-of-pth-in-rabbit
#17
Hiroshi Yamane, Aya Takakura, Yukari Shimadzu, Toshiyuki Kodama, Ji-Won Lee, Yukihiro Isogai, Toshinori Ishizuya, Ryoko Takao-Kawabata, Tadahiro Iimura
Teriparatide [human parathyroid hormone (1-34)], which exerts an anabolic effect on bone, is used for the treatment of osteoporosis in patients who are at a high risk for fracture. That the once-daily administration of teriparatide causes an increase in cortical porosity in animal models and clinical studies has been a matter of concern. However, it is not well documented that the frequency of administration and/or the total dose of teriparatide affect the cortical porosity. The present study developed 4 teriparatide regimens [20 μg/kg/day (D20), 40 μg/kg/day (D40), 140 μg/kg/week (W140) and 280 μg/kg/week (W280)] in the rabbit as a model animal with a well-developed Haversian system and osteons...
2017: PloS One
https://www.readbyqxmd.com/read/28392311/two-examples-of-indication-specific-radiation-dose-calculations-in-dental-cbct-and-multidetector-ct-scanners
#18
Andreas Stratis, Guozhi Zhang, Xochitl Lopez-Rendon, Constantinus Politis, Robert Hermans, Reinhilde Jacobs, Ria Bogaerts, Eman Shaheen, Hilde Bosmans
PURPOSE: To calculate organ doses and estimate the effective dose for justification purposes in patients undergoing orthognathic treatment planning purposes and temporal bone imaging in dental cone beam CT (CBCT) and Multidetector CT (MDCT) scanners. METHODS: The radiation dose to the ICRP reference male voxel phantom was calculated for dedicated orthognathic treatment planning acquisitions via Monte Carlo simulations in two dental CBCT scanners, Promax 3D Max (Planmeca, FI) and NewTom VGi evo (QR s...
April 6, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28384876/primary-ewing-sarcoma-of-sphenoid-bone-with-intracranial-extension-a-common-tumour-at-an-uncommon-location
#19
Guddi Rani Singh, Vijayanand Choudhary, Rawi Agrawal
Primary Ewing Sarcoma of the cranial bone is rare, contributing to only 1% of all Ewing Sarcomas. Primary cranial Ewing Sarcoma occurs most commonly in temporal bone followed by parietal and occipital bones. Sphenoid bone is less commonly involved. We report a case of Ewing Sarcoma of the sphenoid bone with intra-cranial extension in a 20-month-old boy. On CT scan a provisional diagnosis of rhabdomyosarcoma was made. Fine Needle Aspiration Cytology (FNAC) and histopathological examination of core needle biopsy showed small round cell tumour...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384775/superior-canal-dehiscence-syndrome-affecting-3-families
#20
Katherine D Heidenreich, Paul R Kileny, Sameer Ahmed, Hussam K El-Kashlan, Tori L Melendez, Gregory J Basura, Marci M Lesperance
Importance: Superior canal dehiscence syndrome (SCDS) is an increasingly recognized cause of hearing loss and vestibular symptoms, but the etiology of this condition remains unknown. Objective: To describe 7 cases of SCDS across 3 families. Design, Setting, and Participants: This retrospective case series included 7 patients from 3 different families treated at a neurotology clinic at a tertiary academic medical center from 2010 to 2014. Patients were referred by other otolaryngologists or were self-referred...
April 6, 2017: JAMA Otolaryngology—Head & Neck Surgery
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