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https://www.readbyqxmd.com/read/29788991/bilateral-tympanokeratomas-cholesteatomas-with-bilateral-otitis-media-unilateral-otitis-interna-and-acoustic-neuritis-in-a-dog
#1
Liv Østevik, Kathrine Rudlang, Tuva Holt Jahr, Mette Valheim, Bradley Lyndon Njaa
BACKGROUND: An aural cholesteatoma, more appropriately named tympanokeratoma, is an epidermoid cyst of the middle ear described in several species, including dogs, humans and Mongolian gerbils. The cyst lining consists of stratified, keratinizing squamous epithelium with central accumulation of a keratin debris. This case report describes vestibular ganglioneuritis and perineuritis in a dog with chronic otitis, bilateral tympanokeratomas and presumed extension of otic infection to the central nervous system...
May 22, 2018: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/29785976/the-study-of-attenuation-levels-and-the-comfort-of-earplugs
#2
Alessandra G Samelli, Raquel F Gomes, Tiago V Chammas, Bárbara G Silva, Renata R Moreira, Ana C Fiorini
Introduction: This study aimed to analyze and compare four different types of earplugs, divided into premolded plugs and foam plug models, in relation to the level of attenuation, comfort, and the size of the external acoustic meatus (EAM) in an attempt to identify how these variables influence the choice of specific hearing protection devices (HPDs). Materials and Methods: A cross-sectional observational study was performed in a sample of 49 participants, oriented toward the ideal placement of four HPDs, two premolded and two foam plugs (3M™)...
May 2018: Noise & Health
https://www.readbyqxmd.com/read/29777891/surgical-strategy-for-and-anatomical-locations-of-petroapex-and-petroclival-meningiomas-based-on-evaluation-of-the-feeding-artery
#3
Kazuhide Adachi, Mituhiro Hasegawa, Shinichiro Tateyama, Yushi Kawazoe, Yuichi Hirose
OBJECTIVE: The anterior transpetrosal (ATP) approach is the most appropriate approach for petroclival meningiomas, which are typically located from the dorsum sellae to the upper border of the internal acoustic meatus (IAM). Although neurosurgeons can resect over this area if the tumor is detached from the dura, tumors within the indication area for petroclival meningiomas is insufficient for the selection of the ATP approach because it can be difficult to evaluate whether the tumor is attached or only touching the dura...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29731914/significance-of-cytodiagnosis-in-primary-carcinoid-tumor-of-the-middle-ear-a-case-report
#4
Kiminobu Sato, Ryota Mihashi, Takashi Kurita, Hirohito Umeno, Tomoko Yoshida, Akihiko Kawahara, Jun Akiba, Hirohisa Yano
Primary carcinoid tumors of the middle ear are uncommon. Cytodiagnosis of the middle ear is not usually performed as a preoperative examination because of the anatomical structure of the middle ear. To the best of our knowledge, the present study reports for the first time a case of a carcinoid tumor of the middle ear, which was preoperatively diagnosed using cytodiagnosis, and also review current literature. A 22-year-old woman complained of left-sided otalgia. A subcutaneous tumor in the left middle ear was observed...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29680956/micro-ct-study-of-the-human-cochlear-aqueduct
#5
Zhenghua Li, Dazhi Shi, Heng Li, Songhua Tan, Yikang Liu, Chenglin Qi, Anzhou Tang
OBJECTIVE: The anatomic structure of the cochlear aqueduct (CA) in human temporal bone specimens was observed using micro-computed tomography (CT). MATERIALS AND METHODS: Micro-CT scanning of 18-µm-thick slices was performed on 30 slides of human temporal bone specimens to observe the CA structure and its relationship with its surroundings. The length, internal and external apertures, and the narrowest width of the CA were measured. The differences in CAs were compared between high jugular bulb (HJB) specimens and normal specimens...
April 21, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29570519/cystic-progression-of-a-cavernous-malformation-at-the-level-of-the-trigeminal-root-entry-zone-presenting-with-sudden-onset-of-trigeminal-neuralgia
#6
Carlo Giacobbo Scavo, Raffaelino Roperto, Guglielmo Cacciotti, Luciano Mastronardi
BACKGROUND: Cavernous malformations (CM) in the cerebellopontine angle (CPA) are rare, and most of them are solid and extend from the internal auditory canal into the CPA. In contrast, cystic CM arising in the CPA and not involving the internal auditory canal and dura of the skull base are extremely rare. The authors present an uncommon large cystic progression of a cavernous malformation at the level of the trigeminal root entry zone evolving to severe trigeminal neuralgia and brainstem compression...
March 22, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29489413/anomalous-extratemporal-facial-nerve-in-oculoauriculovertebral-spectrum
#7
Linden K Head, Lisa Xuan, Kirsty U Boyd, Daniel A Peters
Facial nerve dysfunction is common in oculoauriculovertebral spectrum (OAVS). However, the course of the nerve has rarely been described. A 23-year-old woman with OAVS underwent excision of microtic ear remnants in preparation for an osseointegrated prosthesis and suffered iatrogenic transection of the facial nerve-the pes anserinus was within the subcutaneous tissue 15 mm posterior and 15 mm cephalad to the external acoustic meatus. The patient underwent primary nerve repair and regained nearly complete preoperative function...
May 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29410583/correlation-between-pulmonary-functions-and-respiratory-muscle-activity-in-patients-with-forward-head-posture
#8
Jeong-Il Kang, Dae-Keun Jeong, Hyun Choi
[Purpose] The purpose of this study is to determine the effect that secondary postural deformities and chronic postural abnormalities have on lung capacity, as well as correlate the activity of the respiratory muscles. The results provide basic objective data about the forward head posture and respiratory muscle activity that can be used in clinical situations. [Subjects and Methods] The subjects used in this study were 24 patients aged 25 to 35 years old who visited a hospital in Jeollanam-do Province, Korea, between September 2015 and January 2016...
January 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29381617/quantification-of-surgical-route-parameters-for-exposure-of-the-jugular-foramen-via-a-trans-mastoidal-approach-exposing-jugular-foramen-in-three-dimensional-visualization-model
#9
Zeng-Hui Qian, Xu Feng, Yang Li, Ke Tang
OBJECTIVE: Surgical operation within the region of the jugular foramen presents a great challenge. The authors characterized the quantitative impact of surgical window parameters on the exposure of the jugular foramen via a trans-mastoidal approach. METHODS: Computed tomography and magnetic resonance imaging data were used to establish a 3-dimensional model of the jugular foramen region. The mastoidale, posterior edge of the mastoid, and the superior edge of the bony external acoustic meatus were selected as points a, b, and c...
January 19, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29218256/intracranial-anatomical-triangles-a-comprehensive-illustrated-review
#10
REVIEW
Doniel Drazin, Joy Mh Wang, Fernando Alonso, Daxa M Patel, Andre Granger, Mohammadali M Shoja, Marios Loukas, Rod J Oskouian, R Shane Tubbs
There are multiple anatomical triangles of the skull base. However, to our knowledge, there has been no comprehensive review of these geometric landmarks. To allow for a safe and consistent approach to lesions of the skull base such as those near the internal carotid artery, internal acoustic meatus, and cavernous sinus, a comprehensive review of the variations with illustrations is required. This article provides an overview of the anatomical borders, dimensions, and surgical implications as well as illustrations of the major skull base triangles...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29097033/-the-tumors-of-the-ear
#11
X Dubernard, J-C Kleiber, E Brenet, M-A Louges, Y Veleine, M Labrousse, M Makeieff, A Bazin, A Chays
Any cutaneous lesion of the outer ear must be managed jointly by a dermatologist and an ENT, regardless of the age of the patient. The presence of a malignant cutaneous carcinoma (Squamous cell carcinoma or melanoma) of the pavilion requires a minimum extension assessment by a cervical ultrasound, CT-scan and MRI will be prescribed according to the degree of infiltration and the presence of clinics signs (lymphadenopathy, facial paralysis, cognitive impairment). A polyp of the external auditory meatus must be systematically biopsied in consultation and, if necessary, in the operating room with fresh anatomopathological analysis...
November 2017: La Presse Médicale
https://www.readbyqxmd.com/read/29067619/transparent-model-of-temporal-bone-and-vestibulocochlear-organ-made-by-3d-printing
#12
Ryoji Suzuki, Naoto Taniguchi, Fujio Uchida, Akimitsu Ishizawa, Yoshinori Kanatsu, Ming Zhou, Kodai Funakoshi, Hideo Akashi, Hiroshi Abe
The vestibulocochlear organ is composed of tiny complex structures embedded in the petrous part of the temporal bone. Landmarks on the temporal bone surface provide the only orientation guide for dissection, but these need to be removed during the course of dissection, making it difficult to grasp the underlying three-dimensional structures, especially for beginners during gross anatomy classes. We report herein an attempt to produce a transparent three-dimensional-printed model of the human ear. En bloc samples of the temporal bone from donated cadavers were subjected to computed tomography (CT) scanning, and on the basis of the data, the surface temporal bone was reconstructed with transparent resin and the vestibulocochlear organ with white resin to create a 1:1...
January 2018: Anatomical Science International
https://www.readbyqxmd.com/read/29057182/anterior-inferior-cerebellar-arteries-juxtaposed-with-the-internal-acoustic-meatus-and-their-relationship-to-the-cranial-nerve-vii-viii-complex
#13
Fernando Alonso, Mohammad W Kassem, Joe Iwanaga, Rod J Oskouian, Marios Loukas, Amin Demerdash, R Shane Tubbs
Vascular loops in the cerebellopontine angle (CPA) and their relationship to cranial nerves have been used to explain neurological symptoms. The anterior inferior cerebellar artery (AICA) has variable branches producing vascular loops that can compress the facial cranial nerve (CN) VII and vestibulocochlear (CN VIII) nerves. AICA compression of the facial-vestibulocochlear nerve complex can lead to various clinical presentations, including hemifacial spasm (HFS), tinnitus, and hemiataxia. The formation of arterial loops inside or outside of the internal auditory meatus (IAM) can cause abutment or compression of CN VII and CN VIII...
August 16, 2017: Curēus
https://www.readbyqxmd.com/read/28983447/surgical-management-and-outcome-experience-of-53-cerebellopontine-angle-meningiomas
#14
Xiaosheng He, Weiping Liu, Yangang Wang, Jun Zhang, Buqing Liang, Jason H Huang
Background Meningiomas follow schwannomas as the second most common cerebellopontine angle (CPA) tumors. We investigate the diagnosis, management, and prognosis of this disease. Methods We reviewed the cases with the CPA meningiomas in our institution in Shaanxi, China from January 2012 to December 2015. Charts were retrospectively examined and patients were divided into two groups: 1) surgical treatment with a retrosigmoid approach for tumor resection and 2) stereotactic radiosurgery treatment only. Patients were followed up and outpatient records were also reviewed...
August 3, 2017: Curēus
https://www.readbyqxmd.com/read/28967306/retrosigmoid-transmeatal-and-suprajugular-approach-for-cerebellopontine-angle-meningioma-operative-video
#15
Ken Matsushima, Michihiro Kohno
Surgical management of cerebellopontine angle meningiomas is challenging due to the intricate neurovascular structures within the limited operative field and the compression of eloquent structures including the brainstem. Surgery on tumors extending into the temporal bone is especially difficult and demands complicated approaches. However, modifications to the retrosigmoid approach utilizing intradural temporal bone drilling enable access to such tumoral extensions without any additional invasive approaches...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28962910/occipital-and-external-acoustic-meatus-to-axis-angle-as-a-predictor-of-the-oropharyngeal-space-in-healthy-volunteers-a-novel-parameter-for-craniocervical-junction-alignment
#16
Kazuaki Morizane, Mitsuru Takemoto, Masashi Neo, Shunsuke Fujibayashi, Bungo Otsuki, Tomotoshi Kawata, Shuichi Matsuda
BACKGROUND CONTEXT: The occipito-C2 angle (O-C2a) influences the oropharyngeal space. However, O-C2a has several limitations. There is no normal value of O-C2a because of the wide individual variations, and O-C2a does not reflect translation of the cranium to the axis, another factor influencing the oropharyngeal space in patients with atlantoaxial subluxation. PURPOSE: The objective of this study was to propose a novel parameter that accounts for craniocervical junction alignment (CJA) and the oropharyngeal space...
September 28, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28959031/coup-tfii-is-required-for-morphogenesis-of-the-neural-crest-derived-tympanic-ring
#17
Wen-Hsin Hsu, Chun-Ming Chen, Li-Ru You
Chicken Ovalbumin Upstream Promoter-Transcription Factor II (COUP-TFII) plays pivotal roles in cell growth, cell differentiation, and cell fate determination. Although genome-wide studies have identified COUP-TFII binding on gene sets mainly involved in neural crest cell (NCC) development and craniofacial morphogenesis, the direct functional connection between COUP-TFII and NCCs in vivo has not been well characterized. In this study, we show that COUP-TFII is expressed in the subpopulation of NCCs and its derivatives, and targeted ablation of COUP-TFII in mouse NCCs results in markedly shortened and bifurcated tympanic rings, which in turn disturb the caudal direction of external acoustic meatus invagination...
September 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28939186/is-the-lateral-angle-of-the-internal-acoustic-canal-sexually-dimorphic-in-non-adults-an-investigation-by-routine-cranial-magnetic-resonance-imaging
#18
G O Afacan, T Onal, G Akansel, A S Arslan
The lateral angle of the internal acoustic canal is one of the measurements of petrous bone that has been previously studied for sex estimation, mostly in adults. We aimed at evaluating the effects of age, side, and sex on the lateral angle of the internal acoustic canal in pediatric patients. Pediatric routine cranial MRI studies were retrospectively investigated for this study. The lateral angle was measured on T2-weighted axial images when the anterior and posterior lips of the meatus and the cochlea were clearly visible on the same image...
October 2017: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/28910896/-measurement-of-morphological-parameters-of-internal-acousticmeatus-using-thin-section-ct
#19
J M Liu, D D Zhu, G H Jin, X W Zhu, L Li, G W Liu, K L Cheng, Y Q Li
Objective: This study aimed to measure the morphological parameters of the internal acoustic meatus(IAM) and its adjacent structures using temporal-bone thin-section CT(computed tomography). Methods: CT images were obtained from 50 Chinese adult patients (25 males and 25 females, 100 sides) which had no visible lesion in the petrous part of the temporal bone and inner ear, the morphological parameters of all inner ear parts were sectionally measured on the specified plane using SPSS 22.0 software for statistical analysis...
September 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28863110/relative-location-of-fundus-meatus-acustici-interni-via-porus-acusticus-internus-in-facial-nerve-decompression
#20
Xu Liu, Haodong Wang, Kailiang Cheng, Youqiong Li
Facial neural edema is the pathophysiological base of Bell's palsy. The middle cranial fossa approach is used to relieve the oppression of facial nerve at its most narrow course in the facial canal. In this research, the authors mainly discussed the internal auditory canal segment of facial nerve, completely in the shadow of the bony structure, which is inconvenient for transmastoid decompression. Therefore, the objective was to explore the definite position of the fundus meatus acustici interni from internal acoustic pore...
September 2017: Journal of Craniofacial Surgery
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