[Otosclerosis. 2nd part. Diagnosis]

Otosclerosis is a bone remodeling disorder affecting exclusively the human temporal bone which causes small bony lesions in the otic capsule. The symptoms depend on the location and the extent of the otosclerotic foci. Hence, clinically the most relevant sign is the conductive hearing loss due to the stapedial otosclerosis with fixation of the stapes footplate. In many cases, the specific anamnestic features, the age of presentation and usually the absence of tympanic membrane pathology can provide a strong clinical suspicion for otosclerosis. Although audiometric and imaging examinations and VEMP testing can confirm our preoperative diagnosis, the histolopathologic examination of the removed stapes footplate is the most accurate way to determine the diagnosis. Orv Hetil. 2019; 160(51): 2007-2011.