Use of CT in the evaluation of cochlear otosclerosis.

Mafee, M F; Valvassori, Galdino E.; Deitch, R L; Norouzi, P; Henrikson, G C; Capek, V; Applebaum, Edward L.

doi:10.1148/radiology.156.3.4023229

Cited by 65 publications

(42 citation statements)

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“…9,10 Otosclerotic foci have been extensively depicted with CT in these areas where cartilaginous remnants are commonly found, namely the fissula ante fenestram and the middle otic layer. 4,11 Therefore, it would be interesting to consider the hypoattenuated focus in the anterior otic capsule as a potential site of otosclerosis and to determine its role in the development of anterior pericochlear otosclerosis.…”

Section: 2mentioning

confidence: 99%

“…1,2 Pericochlear hypoattenuated foci in the middle layer of the otic capsule are routinely observed with thin-section CT in asymptomatic patients where they can mimic pathologic conditions. 3,4 It has been speculated that these foci correspond to cartilage remnants, fibrocartilage, nonmineralized bone, or bone marrow, but this still remains debated. Moreover, in pediatric patients, these hypoattenuated foci have been mostly depicted in the area of the fissula ante fenestram, 5,6 whereas less attention has been paid to other locations, such as the anterior otic capsule.…”

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confidence: 99%

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The Hypodense Focus in the Petrous Apex: A Potential Pitfall on Multidetector CT Imaging of the Temporal Bone

Moser

Veillon²,

Sick³

et al. 2007

AJNR Am J Neuroradiol

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Section: 2mentioning

confidence: 99%

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confidence: 99%

The Hypodense Focus in the Petrous Apex: A Potential Pitfall on Multidetector CT Imaging of the Temporal Bone

Moser

Veillon²,

Sick³

et al. 2007

AJNR Am J Neuroradiol

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“…Na doença retrofenestral, é possível evidenciar na TC uma imagem de luscência ou hipodensidade pericoclear (sinal do duplo halo), o que representa uma faixa de desmineralização endocondral da cóclea ocasionada pela confluência das lesões otoscleróticas ativas. O envolvimento dos canais semicirculares, meato acústico interno, vestíbulo e do endósteo da cóclea também podem ser identificados em pacientes com otosclerose retrofenestral [6][7][8][9][10][11][12] . O objetivo deste estudo é identificar, através da utilização da TCAR, os principais focos otoscleróticos retrofenestrais.…”

Section: Introductionunclassified

Tomografia computadorizada no diagnóstico da otosclerose retrofenestral

Vicente

Penido

Yamashita

et al. 2004

Rev. Bras. Otorrinolaringol.

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Obj etivo:Identificar os principais achados tomográficos da otosclerose retrofenestral. Método: Estudo prospectivo multicêntrico com tomografia computadorizada (TC) de ossos temporais em 54 pacientes com diagnóstico clínico e cirúr-gico de otosclerose. Foi realizada uma análise tomográfica, em que foi avaliada a utilidade da TC no diagnóstico radiológico da otosclerose retrofenestral, sendo verificados os principais sítios de lesões dessa doença. Foram incluídos neste estudo 22 pacientes submetidos à TC de ossos temporais para investigação de outras afecções otológicas, que constituíram o grupo controle. Resultados: Os achados tomográficos foram bilaterais na maioria dos casos e o foco retrofenestral mais prevalente foi o foco pericoclear. Conclusões: A TC monstrou-se útil na identificação dos focos retrofenestrais. A evidência tomográfica desses focos juntamente com o envolvimento endosteal da cóclea podem sugerir uma maior atividade da doença. Andy de Aim:To identify the main tomographic findings of retrofenestral otosclerosis. Methods: A prospective and multicentric study using computed tomography (CT) of the temporal bone in 54 patients with a clinical and surgical diagnosis of otosclerosis. A tomographic analysis has been performed to evaluate the utility of CT scans in diagnosing retrofenestral otosclerosis, verifying the sites of predilection for otosclerotic lesions. In this study, 22 patients undergone CT scans of temporal bones have been included in order to investigate other otologic diseases and have constituted the control group. Results: The tomographic findings were mostly bilateral and the retrofenestral focus more prevalent was the pericochlear focus. Conclusions: The CT scan was useful in the identification of the retrofenestral focuses. The evidence of this focuses and the presence of the endosteal involvement of the cochlea can suggest a higher activity of the disease.Palavras-chave: otosclerose, tomografia computadorizada por Rx, cóclea.

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“…6 Mafee et al studied 32 cases of mixed and sensorineural hearing loss where HRCT proved valuable in detecting otosclerosis, foci of demineralization, and change in bony structure. 7 Present study includes 2 cases of mixed hearing loss in which HRCT shows radiolucent foci involving anterior margin of oval window and spreading to oval window ( Table 9). The present study included 3 cases of congenital ear disease present with (anotia, decreased hearing, deformed pinna, facial palsy) out of which 3 have auricular dysplasia 1 (33.33%) has ossicular fusion and 2 (66.66%) have aberrant course of facial nerve, these HRCT findings are in agreement with findings of Meyer et al 8 It was also found that the extent of auricular anomalies corresponds to the severity of change in the external auditory canal, excessive inclination of the external and internal auditory canals, dysplasia of the middle ear cavity and ossicles.…”

Section: Resultsmentioning

confidence: 99%

Correlation of HRCT mastoid with clinical presentation and operative findings in ear diseases

Chintale¹,

Kirdak²,

Jatale³

et al. 2017

Int J Otorhinolaryngol Head Neck Surg

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INTRODUCTIONThe human temporal bone has an extremely complex structure. Direct axial and coronal CT sections are quite satisfactory for imaging the anatomy of the temporal bone but most of the normal and pathological details of the temporal bone are better visualized with direct sagittal CT sections. The sagittal projection is of interest for surgeons, as it has the advantage of following the plane of surgical approach. HRCT is found to be extremely useful for evaluating the diseases involving the external auditory canal, middle ear cavity, vertical segment of facial nerve canal, vestibular aqueduct, tegmen tympani, sigmoid sinus plate, sinodural angle, carotid canal, jugular fossa, infra and supralabrynthine air cells and temporomandibular joint. HRCT has contributed greatly to an understanding of the complex anatomy and spatial relationship of the minute structures of hearing and balance organs, which are packed into a small pyramidshaped petrous temporal bone. HRCT shows not only soft tissue extension but also gives a more sensitive demonstration of calcification. It has also become useful ABSTRACT Background: HRCT is found to be extremely useful for evaluating the ear diseases involving the external auditory canal, middle ear cavity, vertical segment of facial nerve canal, vestibular aqueduct, tegmen tympani, sigmoid sinus plate, sinodural angle, carotid canal, jugular fossa, infra and supralabrynthine air cells and temporomandibular joint. Our main objective was to correlate the clinical presentation and operative findings of ear diseases with HRCT mastoid. Methods: This study is done in our institute otorhinolaryngology dept. from April 2014 to April 2016. This is prospective study involves 36 patient belonging to different age and sex groups with high suspicious of ear diseases. We have taken detail history of each patient with complete ear nose throat examination done and after that all patient were investigated with routine blood investigation, X-ray and HRCT mastoid to correlate clinical finding and subjected for operation to compare operative findings with HRCT finding. Results: Determined using Pearson chi square test indicated a statistically significant correlation between HRCT temporal bone with clinical presentation and operative findings of ear diseases (p<0.05). Conclusions: With the advent of modern high-resolution CT scanners, detailed demonstration of temporal bone anatomy is practically possible now. We have been able to identify many significant structures not demonstrated by any of the known imaging modalities. The improved contrast and soft tissue a definition possible with HRCT has resulted in production of excellent images of soft tissue lesions in air spaces. Hence HRCT appears to be the diagnostic modality of choice for cholesteatomas and other soft tissue lesions in middle ear.

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Use of CT in the evaluation of cochlear otosclerosis.

Cited by 65 publications

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The Hypodense Focus in the Petrous Apex: A Potential Pitfall on Multidetector CT Imaging of the Temporal Bone

The Hypodense Focus in the Petrous Apex: A Potential Pitfall on Multidetector CT Imaging of the Temporal Bone

Tomografia computadorizada no diagnóstico da otosclerose retrofenestral

Correlation of HRCT mastoid with clinical presentation and operative findings in ear diseases

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