Pendred Syndrome: What It Is and How It Is Managed

Written by Medicover Team and Medically Reviewed by Dr Shashi Kiran Somala , ENT

Pendred Syndrome is a rare inherited disorder that primarily affects hearing and thyroid function. It commonly causes sensorineural hearing loss and may lead to an enlarged thyroid gland (goitre). Early diagnosis and appropriate management can help support hearing, monitor thyroid health, and improve quality of life.

What are the Symptoms of Pendred Syndrome?

Pendred Syndrome symptoms mainly involve hearing, thyroid function, and sometimes balance. Hearing loss is often the earliest feature, while thyroid enlargement may become noticeable later in childhood or adolescence.

Hearing Loss

Sensorineural hearing loss is the most prominent feature of Pendred Syndrome and may affect both ears. The degree of hearing loss can vary and may fluctuate or worsen over time.

• Bilateral involvement: Hearing loss commonly affects both ears.
• Variable severity: Hearing loss may range from mild to profound and can fluctuate in some individuals.
• Early onset: It may be detected in infancy or early childhood.
• Inner ear abnormalities: Structural changes such as an enlarged vestibular aqueduct may be present.

Thyroid Abnormalities

Some individuals develop an enlarged thyroid gland, or goitre, particularly during childhood or adolescence.

• Goitre formation: Thyroid enlargement may occur because of altered iodine transport.
• Thyroid function: Many individuals have normal thyroid hormone levels, although thyroid dysfunction can occur.
• Delayed presentation: Thyroid enlargement may become apparent later than hearing loss.

Vestibular Issues

Inner ear abnormalities may also affect the vestibular system, which helps control balance and spatial orientation.

• Balance disturbances: Some individuals may experience unsteadiness or delayed development of motor skills.
• Dizziness or vertigo: Episodes may occur in some people.
• Reduced vestibular function: Abnormal vestibular function may contribute to coordination or balance difficulties.

Recognizing these symptoms early allows timely hearing support, thyroid monitoring, and management of balance-related problems.

What are the Causes of Pendred Syndrome?

Pendred Syndrome is caused by mutations in the SLC26A4 gene, which affects the function of pendrin, a protein involved in ion transport in the inner ear and thyroid gland. These changes can contribute to hearing loss, inner ear abnormalities, and thyroid enlargement.

Genetic Basis

Pendred Syndrome results from mutations in the SLC26A4 gene. Changes in this gene can interfere with normal development and function of the inner ear and with iodine transport in the thyroid gland.

Inheritance Pattern

Pendred Syndrome follows an autosomal recessive inheritance pattern, meaning an affected person usually inherits two altered copies of the SLC26A4 gene, one from each parent.

• Carrier parents: Both parents typically carry one altered copy of the SLC26A4 gene and may not have symptoms.
• Risk to offspring: When both parents are carriers, each pregnancy has a 25% chance of resulting in a child with Pendred Syndrome.
• Genetic counseling: Families affected by Pendred Syndrome may benefit from genetic counseling to understand inheritance, testing, and reproductive risks.

When to See a Doctor?

Consult an ENT doctor if you notice hearing difficulties, thyroid enlargement, or balance problems that may be associated with Pendred Syndrome.

Get medical help immediately if:

Early evaluation and appropriate management can help address hearing loss, monitor thyroid health, and reduce the impact of Pendred Syndrome on daily life.

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How Is Pendred Syndrome Diagnosed?

Diagnosing Pendred Syndrome involves evaluating hearing, thyroid health, and inner ear structure. Genetic testing can help confirm the diagnosis when clinical findings suggest the condition.

Audiometric Testing

Audiometric testing determines the degree and type of hearing loss and helps assess how hearing changes over time.

Imaging Studies

Magnetic resonance imaging (MRI) or computed tomography (CT) scans may identify inner ear abnormalities such as an enlarged vestibular aqueduct or cochlear structural changes.

Genetic Testing

Genetic testing can identify disease-causing variants in the SLC26A4 gene and may help confirm Pendred Syndrome, particularly when the clinical findings or family history suggest the condition.

What are the Management and Treatment Options for Pendred Syndrome?

There is currently no treatment that reverses the underlying genetic cause of Pendred Syndrome. Management focuses on supporting hearing, monitoring thyroid function, addressing balance problems, and providing appropriate genetic counseling.

Hearing Management

Hearing aids and cochlear implants may be recommended depending on the degree of hearing loss. Early hearing support can improve communication, learning, and quality of life.

Thyroid Management

Regular thyroid examinations and thyroid function tests can help monitor for goitre or thyroid dysfunction. Treatment is provided when abnormal thyroid function develops, while a large goitre may occasionally require surgical evaluation.

Vestibular Management

People with significant balance problems may benefit from physical therapy, balance exercises, or vestibular rehabilitation to improve stability and reduce the risk of falls.

Genetic Counseling

Genetic counseling can help affected individuals and families understand the autosomal recessive inheritance pattern, future pregnancy risks, and available genetic testing options.

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What Research Is Being Done on Pendred Syndrome?

Research into Pendred Syndrome continues to examine how SLC26A4 mutations affect the inner ear and thyroid gland. These studies may help improve understanding of the condition and identify better approaches to diagnosis and management.

Current Studies

Researchers are studying the SLC26A4 gene, pendrin function, and the factors that influence differences in hearing and thyroid manifestations among affected individuals.

Potential Therapies

Future approaches, including gene-based and targeted therapies, are being investigated in research settings. These approaches are not yet established treatments for Pendred Syndrome.

How Can People Live Well with Pendred Syndrome?

With appropriate hearing support, regular thyroid monitoring, and access to educational and family support, many people with Pendred Syndrome can manage the condition effectively and participate fully in daily activities.

Support and Resources

Hearing specialists, audiologists, endocrinologists, genetic counselors, and support organizations can provide practical guidance and help individuals and families manage the long-term effects of the condition.

Education and Awareness

Early identification of hearing loss and awareness of the possibility of Pendred Syndrome can support timely evaluation and intervention, particularly in children with a family history of the condition.