Vestibular impairment in cochlear implanted children presenting enlarged vestibular aqueduct and enlarged endolymphatic sac

Abstract Enlarged vestibular aqueduct (EVA) is a common finding in tomodensitometry. When cranial MRI performed, enlarged endolymphatic sac (EES) can also be found. Profound hearing loss these patients but few studies have investigated function after cochlear implantation (CI) EVA and EES patients. Our main objective was to find out whether children candidates CI, higher (ES) volume predictive for rates of postsurgical complications. Methods We retrospectively included who benefited from during the last 2 years. Two groups were constituted according presence or not impairment (decrease VOR gain on VHIT test one semicircular canals and/or cVEMPs) 6 months CI. Endolymphatic both VA ES measured each patient. Results Fifteen included. The mean endolymph significantly impaired group (0.40 cm3 ± 0.23, range 0.08–0.70) than non-impaired (0.11 cm3 ± 0.07, 0.04–0.29; p = 0.029). Four followed year. At end rehabilitation, all recovered lateral canal saccular function. Conclusion In children, combined appears increase risk severe post CI impairment. To minimize this prior surgery, besides tomodensitometry, measurement should systematically performed.