Sensorineural Hearing Loss and Otosclerosis: A Clinical and Radiologic Survey of 437 Cases

The aim of this study was to determine if a relationship exists between bone level thresholds and the extension of otosclerotic foci within the otic capsule. The study consisted of a retrospective case review in a university hospital. We included patients who underwent surgery for otosclerosis in ou...

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Bibliographic Details
Published in:Acta oto-laryngologica 2001-01, Vol.121 (2), p.200-204
Main Author: Young Je Shin, Bernard Fraysse, Olivier Deguine, Christophe Cognard, Jean-Paul Charlet, Annick Sévely
Format: Article
Language:English
Subjects:
Adult
Auditory Threshold - physiology
Biological and medical sciences
Bone Conduction - physiology
Bone Conduction Thresholds Cochlea Computerized Tomography Deafness Otosclerosis Radiology Sensorineural Hearing Loss
Cochlea - physiopathology
Cochlea - surgery
Ear Ossicles - physiopathology
Ear Ossicles - surgery
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Female
Follow-Up Studies
Hearing Loss, Sensorineural - diagnosis
Hearing Loss, Sensorineural - physiopathology
Hearing Loss, Sensorineural - surgery
Humans
Male
Medical sciences
Middle Aged
Non tumoral diseases
Otorhinolaryngology. Stomatology
Otosclerosis - diagnosis
Otosclerosis - physiopathology
Tomography, X-Ray Computed
Treatment Outcome
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Summary:The aim of this study was to determine if a relationship exists between bone level thresholds and the extension of otosclerotic foci within the otic capsule. The study consisted of a retrospective case review in a university hospital. We included patients who underwent surgery for otosclerosis in our department and who had a CT scan prior to surgery. We analyzed the data charts and CT scans of 437 cases (386 patients). On CT scan, we distinguished patients with fenestral otosclerosis and/or with a pericochlear focus. A pericochlear focus could be extended (Group 2) or not (Group 1) to the cochlear endosteum. Data for Groups 1 and 2 were compared with those for the control group of all patients for whom CT scan showed no cochlear focus (Group 3). Of the 437 CT scans, 399 were positive (91.3%). An anterior focus was reported in 305 cases (69.8%), a footplate thickening in 21 cases (4.8%) and both anomalies were encountered in 60 cases (13.7%). A pericochlear focus was reported in 53 examinations. This focus was extended to the endosteum in 14 cases (26.4% of the pericochlear foci). In Group 1, preoperative air conduction (AC) thresholds were significantly lower than in the control group (p
ISSN:0001-6489
1651-2251
DOI:10.1080/000164801300043505