Definition of Otosclerosis:

Otosclerosis is an abnormal bone growth in the middle ear that causes hearing loss.

Causes, incidence, and risk factors:

The cause of otosclerosis is unknown. However, there is some evidence that it may be passed down through families.

People who have otosclerosis have an abnormal sponge-like bone growing in the middle ear. This growth prevents the ear from vibrating in response to sound waves. Such vibrations are needed in order for you to hear.

Otosclerosis is the most frequent cause of middle ear hearing loss in young adults. It typically begins in early to mid-adulthood. It is more common in women than in men. The condition usually affects both ears.

Risks for this condition include pregnancy and a family history of hearing loss. Caucasians are more likely to develop this condition than others.