The finding of an LVA in children with SNHL provides diagnostic as well as prognostic information.

Epidemiologic analysis of this consecutive series of patients who underwent BMT placement in a tertiary care pediatric otolaryngology practice suggests that 1 in 5 patients will subsequently require a second set of ventilation tubes. Age younger than 18 months at the time of the initial BMT procedure is associated with an increased risk for additional surgery but is not an independent risk factor. Adenoidectomy reduces the incidence of subsequent BMTs following initial surgery.

BACKGROUND AND PURPOSE:The size of vestibular aqueducts (VAs) seen on CT studies varies. The current practice of calling a VA enlarged when it exceeds a certain threshold (eg, 1.5 mm at the midpoint) is arbitrary. Our hypothesis was that statistical analysis of the range of VA widths in a normal-hearing population would lead to a mathematic definition of the upper-limit-of-normal VA width.

To correlate genetic and audiometric findings with a detailed radiologic analysis of the temporal bone in patients with enlarged vestibular aqueduct (EVA) to ascertain the contribution of SLC26A4 gene mutations to this phenotype. Design: A retrospective review of patients with EVA identified in a database of pediatric hearing-impaired patients. Setting: A tertiary care pediatric referral center. Patients: Seventy-one children with EVA and screening results for SLC26A4 mutations. Main Outcome Measures: Genetic screening results, audiometric thresholds, and radiographic temporal bone measurements. Results: Seventy-one children with EVA were screened for SLC26A4 mutations. Mutations were found in 27% of children overall, while only 8% had biallelic mutations. The mean initial pure-tone average (PTA) was 59 dB; the mean final PTA was 67 dB. A bilateral EVA was found in 48 (67%) of the children; a unilateral EVA was Author Affiliations are listed at the end of this article.