The goal of this study was to assess the reliability of CT-Scan in the cases of conductive @entity393 with normal tympanic membrane. A computed tomography of the temporal bone (CT-Scan) has been performed in a prospective manner in all @entity1 who underwent surgery for a conductive @entity393 with a normal tympanic membrane in our department. Out of 474 cases, 437 cases (92.2%) presented with @entity8719 . In 25 cases a minor @entity600 (5.3%) was found at surgery, and in 12 cases (2.5%), another diagnosis was made. Sensitivity of CT-Scan was 91.3% in @entity8719 and 57% in minor @entity600 . In 8.7% of cases, a superficial and beginning surgical focus was put in evidence whereas CT-Scan was normal. Theses cases represent infra-radiological cases of @entity8719 . In case of @entity8719 , @entity8719 was found in 83.5% of the cases. CT-Scan was found specific on the operated and deaf side, but in 11.3% of the cases, a radiologic focus did not have a clinical consequence on the controlateral side. A radiological focus is not systematically responsible for a @entity393 . Finally, CT-Scan remains a reliable, sensitive and specific exam in the diagnosis of cases of conductive @entity393 with normal tympanic membrane.

[Reliability of CT scan in the diagnosis of conductive XXXX with normal tympanic membrane].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity393 :: ('MESH:D034381', 'Disease') :: ['hearing loss', 'hearing losses'] @entity8719 :: ('MESH:D010040', 'Disease') :: ['otosclerosis', 'radiological otosclerosis', 'fenestral otosclerosis'] @entity600 :: ('MESH:D000014', 'Disease') :: ['malformations', 'malformation']
@entity393 :: (MESH:D034381,Disease) :: ['hearing loss']
