Enlarged Vestibular Aqueduct

The enlarged vestibular aqueduct (EVA) is an anatomical variation that is often associated with hearing loss. This condition involves the enlargement of a small canal, the vestibular aqueduct, that runs through the inner ear. It is believed that abnormal development of the aqueduct during ear formation leads to a larger-than-normal aqueduct. EVA is most commonly associated with progressive hearing loss, especially in the high frequencies, and is more commonly seen in children. Because of its link to hearing loss, early diagnosis and regular monitoring of hearing levels may be important to manage auditory symptoms and prevent any further loss. Hearing aids or cochlear implants may be helpful to treat hearing loss caused by EVA.