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    Question ID:   17826         Current Version: 1
Question: How are enlarged vestibular aqueducts related to childhood hearing loss?
Category: Diseases & Conditions > Other
Keywords: enlarged vestibular aqueducts, EVA, relate, child, childhood hearing loss
Type: how
Rating:(0 ratings)    Views: 112    Discussions: 0   In Watch Lists: 1  

 
    Answer:
Research suggests that most children with enlarged vestibular aqueducts (EVA) will develop some degree of hearing loss. Scientists also are finding that five to 15 percent of children with sensorineural hearing loss, or hearing loss caused by damage to sensory cells inside the cochlea, have EVA. However, scientists do not think that EVA causes hearing loss. Instead, scientists regard EVA as an important clue about hearing loss and its possible causes. This information helps physicians talk with families about how their child's hearing loss may change over time.

The presence of EVA can be a symptom of a genetic disorder called Pendred syndrome, a cause of childhood hearing loss. According to a study by the National Institute on Deafness and Other Communication Disorders (NIDCD), approximately one-third of individuals with EVA and hearing loss have Pendred syndrome. With Pendred syndrome, the hearing loss is progressive, which means that a child will have less hearing over time. Some children may become totally deaf.

In addition to its association with hearing loss, EVA may also be linked with balance symptoms in a small percentage of people. However, the brain is very good at making up for a weak vestibular system, and most children and adults with EVA do not have a problem with their balance or have difficulty doing routine tasks.

Source: National Institute on Deafness and Other Communication Disorders
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