Computed Tomography in the Diagnosis of Otosclerosis

Vicente, Andy de Oliveira; Yamashita, H; Albernaz, Pedro Luiz Manguabeira; Penido, Norma de Oliveira

doi:10.1016/j.otohns.2005.11.030

Cited by 40 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Veillon, this location is found in 80.9% of the analyzed ears [4]. -The other sites include cochlear (or round) window (2.9% to 9.5% of cases), peri-cochlear capsule and the anterior wall of the internal auditory canal [4] [8]- [11]. In 1993, Valvassori [6] reported that the otosclerotic lesion must be greater than or equal to 1 mm to be visible on CT sections.…”

Section: Discussionmentioning

confidence: 99%

Otosclerosis: Contribution of Computed Tomography and Radio-Anatomical Correlations

Khamassi¹,

Mahfoudhi²,

Mbarek³

et al. 2015

OJCD

View full text Add to dashboard Cite

Otosclerosis is an osteodystrophia of the otic capsule, responsible for hearing loss by blocking of the stapes footplate. The purpose of this study was to evaluate the reliability of computed tomography (CT) in the positive diagnosis of otosclerosis, to compare the radiological findings to those intraoperatively, and to seek a correlation between imaging data and postoperative audiometric results. This is a retrospective study of 60 patients having otosclerosis, treated in our department between 2009 and 2011. All patients underwent an otoscopic examination, pure tone and vocal audiometry, impedancemetry and petrous CT scan. At petrous CT scan, a footplate thickening was found in 9 cases. Labyrinthine bone hypodensity was noted in 51 cases. Sensitivity of CT in the diagnosis of otosclerosis was 100%. Regarding the operative findings and their correlation with imaging, we found that among the 7 facial canal procidences reported intraoperatively, CT had identified 6, with a sensitivity of 86%. Of the 53 facial nerve in normal position intraoperatively, CT had only identified 34, with a specificity of 64%. Regarding the ossicles, there were 6 cases of abnormalities of the incus, among them 3 were identified on CT, with a sensitivity of 50%. The 54 patients with normal ossicular chain intraoperatively were all identified as such on CT, with a specificity of 100% (p = 0.001). For correlation between imaging and postoperative results, it was found that patients with extended otosclerosis had lower postoperative audiometric improvement than those having localized disease (p < 0.05). Computed tomography is necessary for the diagnosis of otosclerosis. It also helps, with good sensitivity and specificity, seeking for anatomical variants that the surgeon could possibly encounter during surgical procedure. Finally, there is a statistically significant correlation between imaging data and postoperative audiometric results, allowing establishing a functional prognosis even before surgery.

show abstract

Section: Discussionmentioning

confidence: 99%

Otosclerosis: Contribution of Computed Tomography and Radio-Anatomical Correlations

Khamassi¹,

Mahfoudhi²,

Mbarek³

et al. 2015

OJCD

View full text Add to dashboard Cite

show abstract

“…1). 1 These foci are best evaluated in the axial view, since the oval window has an anteroposterior orientation. Fenestral foci of $ 1mm might already be identified in more widely available HRCTs.…”

Section: Review Of a Particular Subject Computed Tomography Scans In mentioning

confidence: 99%

“…Otosclerosis is a primary focal osteodystrophy of the otic capsule affecting genetically predisposed individuals and whose etiology remains unknown. 1 When the disease is activea phase also called otospongiosisthe histologically normal endochondral bone of the otic capsule is replaced by disorganized foci of Haversian bone; with progression and reduced disease activity, however, the bone involved becomes dense and sclerotic. 2 When the otosclerotic lesions compromise the stapediovestibular joint and/or inner ear components, patients develop hearing loss (HL) that might be conductive, sensorineural or mixed.…”

Section: Introductionmentioning

confidence: 99%

Imaging Studies in Otosclerosis: An Up-to-date Comprehensive Review

Mangia

Coelho²,

Carvalho

et al. 2020

Int Arch Otorhinolaryngol

View full text Add to dashboard Cite

Introduction Otosclerosis is a primary osteodystrophy of the otic capsule, frequently responsible for acquired hearing loss in adults. Although the diagnostic value of imaging investigations in otosclerosis is debatable, they might still be employed with different goals within the context of the disease. Objectives The present paper aims to review the most recent literature on the use of imaging studies in otosclerosis for the most varied purposes, from routine application and differential diagnosis to prognostic prediction and investigation of surgical failure. Data Synthesis The diagnosis of otosclerosis is usually clinical, but computed tomography (CT) is paramount in particular cases for the differential diagnosis. The routine use, however, is not supported by strong evidence. Even so, there is growing evidence of the role of this method in surgical planning and prediction of postoperative prognosis. In specific scenarios, for example when superior semicircular canal dehiscence (SSCD) syndrome is suspected or in surgical failure, CT is crucial indeed. Magnetic resonance imaging (MRI), however, has limited – although important – indications in the management of individuals with otosclerosis, especially in the evaluation of postoperative complications and in the follow-up of medical treatment in active ostosclerosis. Conclusion Imaging studies have a broad range of well-established indications in otosclerosis. Besides, although the routine use of CT remains controversial, the most recent papers have shed light into new potential benefits of imaging prior to surgery.

show abstract

“…Diagnosis is based on a combination of medical history, physical examination, audiological testing and imaging. The clinical findings include conductive, mixed, or rarely, pure sensorineural hearing loss and vertiginous symptoms in the absence of middle ear inflammation[ 2 , 7 , 8 ]. Surgical or histological confirmation is important in correlating clinical findings.…”

Section: Introductionmentioning

confidence: 99%

“…CT highlights differences in the density of the capsule’s outline, the so called double ring sign, which is a low density demineralised endochondral defect outlining the cochlea[ 7 , 9 ]. The density of disease foci increases in otosclerosis giving an appearance resembling normal otic capsule bone thereby complicating diagnosis and increasing the false negative rates[ 1 , 2 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Diagnostic performance of high resolution computed tomography in otosclerosis

Kanzara¹,

Virk²

2017

WJCC

View full text Add to dashboard Cite

AIMTo determine the sensitivity and specificity of high resolution computed tomography (HRCT) in the diagnosis of otosclerosis.METHODSA systematic literature review was undertaken to include Level I-III studies (Oxford Centre for Evidenced based Medicine) that utilised HRCT to detect histology confirmed otosclerosis. Quantitative synthesis was then performed.RESULTSBased on available level III literature, HRCT has a relatively low sensitivity of 58% (95%CI: 49.4-66.9), a high specificity, 95% (95%CI: 89.9-98.0) and a positive predictive value of 92% (95%CI: 84.1-95.8). HRCT is better at diagnosing the more prevalent fenestral form of otosclerosis but remains vulnerable to inframillimetre, retrofenestral and dense sclerotic lesions, despite the advent of more advanced CT scanners with improved collimation.CONCLUSIONWhilst the diagnosis of otosclerosis remains largely clinical, HRCT remains the gold standard imaging of choice for the middle ear and serves as a useful adjunct to the clinician, helping to delineate extent of disease and exclude other causes.

show abstract

Computed Tomography in the Diagnosis of Otosclerosis

Abstract: B-3b.

Cited by 40 publications

References 15 publications

Otosclerosis: Contribution of Computed Tomography and Radio-Anatomical Correlations

Otosclerosis: Contribution of Computed Tomography and Radio-Anatomical Correlations

Imaging Studies in Otosclerosis: An Up-to-date Comprehensive Review

Diagnostic performance of high resolution computed tomography in otosclerosis

Contact Info

Product

Resources

About