Optimizing Genetic Evaluation in Pediatric Sensorineural Hearing Loss: A Practical Guide for Hearing Specialists

Introduction

In this module, John A. Germiller, MD, PhD discusses the latest developments in diagnosing and managing pediatric sensorineural hearing loss (SNHL). Learn how the understanding of genetics linked to pediatric hearing loss has recently evolved, why all children with SNHL need to receive genetic testing and counseling, and how these results and other patient-specific factors inform management planning with current and emerging interventions.

Before continuing with this educational activity, please take a moment to answer the following questions.

How many people with SNHL do you provide care for in a typical week?

A.
1-4
B.
5-10
C.
11-15
D.
16-20
E.
>20
F.
Not applicable

For those who practice in academic or community settings, please indicate your practice setting:

A.
Academic
B.
Community
C.
Not applicable

Noah is a 10-month-old boy with bilateral severe to profound SNHL, limited aided benefit with hearing aids, normal cochlear nerves on imaging, and biallelic pathogenic OTOF variants.

Which counseling approach is most appropriate?

A.
Explain that the genetic testing results confirm the etiology and support timely cochlear implant evaluation, while also determining if Noah meets the criteria for genotype-specific therapy and continuing standard developmental and audiologic management
B.
Recommend delaying cochlear implant evaluation because genetic forms of hearing loss should be managed conservatively until the child is old enough to provide reliable behavioral audiometry and speech perception scores
C.
Counsel that cochlear implantation is unlikely to help because OTOF-related hearing loss reflects a genetic disorder, and genetic causes are generally associated with poor cochlear implant outcomes
D.
Proceed directly to cochlear implantation because genetic test results are useful for diagnosis but do not influence hearing technology counseling or treatment sequencing

You are seeing Sofia, a 14-month-old girl with bilateral severe to profound SNHL and limited benefit with hearing aids. A comprehensive gene panel for hearing loss indicates biallelic pathogenic GJB2 variants. Sofia’s parents ask if they should delay cochlear implant evaluation for Sofia, given the newly approved OTOF-directed gene therapy, and wait for a similar treatment to become available.

Which response is most appropriate?

A.
“Because GJB2 is one of the most common genetic causes of pediatric SNHL, Sofia should be considered a likely candidate for the same gene therapy pathway that is approved for OTOF-related hearing loss.”
B.
“Because gene therapy is advancing rapidly, it is safest to pause cochlear implant evaluation until a GJB2-directed gene therapy is approved or a clinical trial opens that might preserve future treatment options.”
C.
“The approved OTOF-directed gene therapy does not apply to GJB2-related genetic hearing loss; we should continue timely cochlear implant evaluation and standard hearing management, with the understanding that GJB2-directed therapies, if available, would need to be evaluated separately.”
D.
“Because Sofia has a confirmed nonsyndromic genetic hearing loss diagnosis, there is no current need to discuss emerging therapies, clinical trials, or future treatment options as part of family counseling.”

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Optimizing Genetic Evaluation in Pediatric Sensorineural Hearing Loss: A Practical Guide for Hearing Specialists

John A. Germiller, MD, PhD

Activity

Introduction

How many people with SNHL do you provide care for in a typical week?​

For those who practice in academic or community settings, please indicate your practice setting:

Which counseling approach is most appropriate?

Which response is most appropriate?

How many people with SNHL do you provide care for in a typical week?