scholarly journals Carotid-cochlear dehiscence: a dangerous mimicker of inner ear pathologies

2019 ◽  
Vol 12 (7) ◽  
pp. e229773
Author(s):  
Sina Koochakzadeh ◽  
James R Dornhoffer ◽  
Joshua D Horton ◽  
Ted A Meyer
Keyword(s):  
Ct Scan ◽  
Inner Ear ◽  
Temporal Bone ◽  
Treatment Options ◽  
Rare Condition ◽  
The Past ◽  
Carotid Canal ◽  
Bony Canal ◽  
Diagnostic Characteristics ◽  
Temporal Bone Ct

A 67-year-old woman was referred to the otolaryngology service after presenting to the emergency department for dizziness and loss of balance. She reported several similar episodes over the past years. Physical examination was unremarkable. A temporal bone CT scan revealed dehiscence between the bony carotid canal and the cochlea resulting in the diagnosis of carotid-cochlear dehiscence (CCD). CCD is an extremely rare condition involving the thinning of the bony canal separating the internal carotid artery from the cochlea. CCD is best diagnosed with temporal bone CT scan. Treatment options include observation as well as chemical or surgical labyrenthectomy. Despite similar clinical and diagnostic characteristics of reported CCD cases, general trends and consensus on treatment options cannot be ascertained due to the extreme rarity of this condition. Regardless of these limitations, CCD is a critical diagnosis as it mimics other inner ear conditions and poses a potential, significant surgical risk for the otolaryngologist.

scholarly journals Congenital unilateral facial palsy revealing a facial nerve agenesis: a case report and review of the literature

2019 ◽  
Vol 5 (1) ◽  
pp. 20180029
Author(s):  
Yaotse Elikplim Nordjoe ◽  
Ouidad Azdad ◽  
Mohamed Lahkim ◽  
Laila Jroundi ◽  
Fatima Zahrae Laamrani
Keyword(s):  
Case Report ◽  
Facial Nerve ◽  
Temporal Bone ◽  
Facial Paralysis ◽  
Facial Palsy ◽  
Rare Condition ◽  
Review Of The Literature ◽  
Moebius Syndrome ◽  
Temporal Bone Ct

Facial nerve aplasia is an extremely rare condition that is usually syndromic, namely, in Moebius syndrome. The occurrence of isolated agenesis of facial nerve is even rarer, with only few cases reported in the literature. We report a case of congenital facial paralysis due to facial nerve aplasia diagnosed on MRI, while no noticeable abnormality was detected on the temporal bone CT.

Otopalatodigital syndrome type I: New temporal bone CT-scan sign in a case with a de novo novel mutation

2019 ◽  
Vol 70 (5) ◽  
pp. 306-309
Author(s):  
Marta Martínez-López ◽  
Ana Navedo ◽  
Reyes López De Mesa ◽  
Francisco Javier Cervera-Paz
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
De Novo ◽  
Novel Mutation ◽  
Type I ◽  
Syndrome Type ◽  
Temporal Bone Ct ◽  
Otopalatodigital Syndrome

scholarly journals Automatic segmentation of inner ear on CT-scan using auto-context convolutional neural network

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Raabid Hussain ◽  
Alain Lalande ◽  
Kibrom Berihu Girum ◽  
Caroline Guigou ◽  
Alexis Bozorg Grayeli
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Ct Scan ◽  
Inner Ear ◽  
Temporal Bone ◽  
Ct Images ◽  
Patient Specific ◽  
Micro Ct ◽  
Data Set ◽  
3D Vision

AbstractTemporal bone CT-scan is a prerequisite in most surgical procedures concerning the ear such as cochlear implants. The 3D vision of inner ear structures is crucial for diagnostic and surgical preplanning purposes. Since clinical CT-scans are acquired at relatively low resolutions, improved performance can be achieved by registering patient-specific CT images to a high-resolution inner ear model built from accurate 3D segmentations based on micro-CT of human temporal bone specimens. This paper presents a framework based on convolutional neural network for human inner ear segmentation from micro-CT images which can be used to build such a model from an extensive database. The proposed approach employs an auto-context based cascaded 2D U-net architecture with 3D connected component refinement to segment the cochlear scalae, semicircular canals, and the vestibule. The system was formulated on a data set composed of 17 micro-CT from public Hear-EU dataset. A Dice coefficient of 0.90 and Hausdorff distance of 0.74 mm were obtained. The system yielded precise and fast automatic inner-ear segmentations.

scholarly journals External auditory canal osteoma

2009 ◽  
Vol 137 (1-2) ◽  
pp. 73-76 ◽  
Author(s):  
Marko Sente
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
External Auditory Canal ◽  
Histopathological Examination ◽  
Benign Neoplasm ◽  
Growth Direction ◽  
Radiographic Examination ◽  
Unknown Etiology ◽  
Temporal Bone Ct ◽  
Slow Growing

Introduction. Osteomas are a slow growing benign neoplasm of unknown etiology very rarely involving the temporal bone. They develop in the external auditory canal on squamous sections, in the mastoid, middle and inner ear. By bone composition they are divided into spongious (osteoma spongiosum) and compact osteomas (osteoma eburnum); by growth direction, into outward-growing (exosteoma) and in inwardgrowing (endosteoma); into unilateral and bilateral; by size, into small and gigantic; by surface structure, into smooth and multilobular; by number, into solitary and multiple; into symmetrical and asymmetrical. The symptoms of intracanalicular osteomas are the result of auditory canal obstruction. Diagnosis is made based on case history, clinical examination, audiological processing and radiography (temporal bone CT scan), and confirmed by histopathological examination of the bone. In terms of differential diagnosis, they must be distinguished from exostoses, bone tissue proliferation and osteoid osteomata. The progress of the disease is prolonged, as they are slow growing, asymptomatic and benign tumours. Therapy is surgical only. Case Outline. The report presents the case of a 70-year old patient with the osteoma of the right external auditory canal. In our patient, the osteoma arose in the auditory canal, the most frequent localization; it was unilateral, solitary, multilobular and compact. It was discovered accidentally, during otoscopic examination. The clinical diagnosis was confirmed by CT scan of the temporal bone. We applied surgical therapy by retroauricular approach. The removed bone change was about 12 mm high, 13-14 mm deep and about 8 mm wide. Histopathological findings confirmed osteoma. Conclusion. Due to their slow growth, the rate of auditory canal osteomas develop asymptomatically for a long time without the characteristic clinical features. In most cases, they are discovered accidentally during otoscopic or radiographic examination. The method of choice in diagnosis is temporal bone CT scan. Therapy is surgical.

Eight Items to Check on a Temporal Bone CT-Scan

ORL ◽  
2018 ◽  
Vol 80 (5-6) ◽  
pp. 338-344 ◽  
Author(s):  
Jose Fernando Polanski ◽  
Lucas Resende Lucinda ◽  
Thomas Linder
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
Temporal Bone Ct

Temporal Bone CT Scan for Malleal Ligaments Assessment

2018 ◽  
Vol 39 (10) ◽  
pp. e1054-e1059 ◽  
Author(s):  
Yona Vaisbuch ◽  
Davood K. Hosseini ◽  
Bryan Lanzman ◽  
Stephen C. Marcott ◽  
Yifei Ma ◽  
...  
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
Temporal Bone Ct

The relationship between tinnitus and vascular anomalies on temporal bone CT scan: a retrospective case control study

2016 ◽  
Vol 38 (7) ◽  
pp. 835-841 ◽  
Author(s):  
Betul Kizildag ◽  
Nagihan Bilal ◽  
Nursel Yurttutan ◽  
Mehmet Akif Sarica ◽  
Gulay Gungor ◽  
...  
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
Case Control Study ◽  
Case Control ◽  
Vascular Anomalies ◽  
Retrospective Case ◽  
Temporal Bone Ct ◽  
The Relationship ◽  
Control Study

scholarly journals Comparison of Temporal Bone Tomography Findings of Chronic Otitis Media with Intraoperative Findings

2019 ◽  
Vol 7 (2) ◽  
pp. 17
Author(s):  
Yalda Jabbari Moghaddam ◽  
Farnaz Chalabianloo
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
Otitis Media ◽  
Chronic Otitis Media ◽  
Common Disease ◽  
Suppurative Otitis Media ◽  
X Ray ◽  
Temporal Bone Ct ◽  
Preoperative Ct ◽  
Surgical Field

Background and Objectives: Chronic otitis media is considered a common disease in our region. There are various methods for evaluation of chronic suppurative otitis media including otoscopy, CT scan, X-ray, and MRI. Nowadays, computed tomography or CT scan is used as the selected method to investigate the temporal bone. This study aims to collect the intraoperative findings and compare them with preoperative reports of temporal bone CT scans. Materials and Methods: The patients’ data with chronic otitis media who were reviewed tomographically, hospitalized and operated between 2012 and 2014 in Tabriz Sina Hospital by only one otolarynologist included in this study collected. Results: The most common lesion based on the highest frequency and percentage is Tympanosclerosis. 21.4 percent of patients whom Tympanosclerosis were not diagnosed preoperatively, found during the surgery. 78.9 And 21.1 percent of bone erosions have been diagnosed by CT scan and by direct vision, respectively. Conclusion: Although preoperative CT of Middle ear lesions is useful for surgery planning but some lesion may not be completely diagnosed by CT scan and intraoperative assessment of surgical field is crucial.

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