Document Detail

Sensorineural hearing loss and otosclerosis: a clinical and radiologic survey of 437 cases.
MedLine Citation:
PMID:  11349779     Owner:  NLM     Status:  MEDLINE    
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 < 0.05). The air--bone gap was also significantly larger in Group 1 (p < 0.05). Bone conduction (BC) thresholds were lower in Group 1 than in the control group but the difference was not significant. In Group 2, preoperative AC thresholds were significantly lower than in the control group (p < 0.05). BC thresholds were also lower in Group 2 than in the control group and the difference was significant (p < 0.05). As a result of this study, we assume that there may be a relationship between bone level thresholds and the radiological extension of otosclerosis within the otic capsule.
Y J Shin; B Fraysse; O Deguine; C Cognard; J P Charlet; A Sévely
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta oto-laryngologica     Volume:  121     ISSN:  0001-6489     ISO Abbreviation:  Acta Otolaryngol.     Publication Date:  2001 Jan 
Date Detail:
Created Date:  2001-05-14     Completed Date:  2001-10-18     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370354     Medline TA:  Acta Otolaryngol     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  200-4     Citation Subset:  IM    
Department of Otolaryngology, Purpan Hospital, Toulouse, France.
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MeSH Terms
Auditory Threshold / physiology*
Bone Conduction / physiology*
Cochlea / physiopathology,  surgery
Ear Ossicles / physiopathology,  surgery
Follow-Up Studies
Hearing Loss, Sensorineural / diagnosis*,  physiopathology,  surgery
Middle Aged
Otosclerosis / diagnosis*,  physiopathology
Tomography, X-Ray Computed*
Treatment Outcome

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