Enlarged vestibular aqueduct
Patient with hearing loss, previously diagnosed with "arachnoid cyst".
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Massive enlargement of the left vestibular aqueduct (which contains the endolymphatic duct and sac). The other fluid-filled structures of the inner ear seem normal.
Enlargement of the vestibular aqueduct and its contents is the most common component of congenital inner ear dysplasias. It is more often bilateral than unilateral and is associated with the Mondini malformation of the cochlea in about 8% of cases 1.
- 1. Valvassori GE, Clemis JD. The large vestibular aqueduct syndrome. Laryngoscope. 1978;88 (5): 723-8. - Pubmed citation
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