Overview
X-linked external auditory canal atresia with dilated internal auditory canal and facial dysmorphism syndrome is a very rare genetic condition that mainly affects the ears and facial features. 'Atresia' means that the ear canal — the tube that carries sound from the outside of the ear to the eardrum — is blocked or did not form properly. At the same time, the internal auditory canal, which is a bony channel deep inside the skull that carries important nerves for hearing and balance, is unusually wide (dilated). Together, these ear problems cause significant hearing loss from birth. People with this condition also have distinctive facial features that a doctor or geneticist can recognize during an examination. Because this condition is X-linked, it is caused by a change (variant) in a gene on the X chromosome. This means it mainly affects males, while females who carry the gene change may have milder features or none at all. The hearing loss is present from birth and is considered a structural problem, meaning it is caused by the way the ear formed during pregnancy rather than by damage over time. Treatment focuses on managing hearing loss and supporting communication and development. Options may include bone-anchored hearing aids or other hearing devices suited to the type of hearing loss present. Early intervention with speech therapy and hearing support is very important. There is currently no cure, but with the right support, many individuals can lead fulfilling lives. Genetic counseling is strongly recommended for affected families.
Key symptoms:
Blocked or absent ear canal (external auditory canal atresia) present from birthWidened internal auditory canal seen on imagingSignificant hearing loss from birth (conductive and/or sensorineural)Distinctive facial features recognized by a specialistPossible abnormalities of the outer ear (ear shape or size)Possible balance difficulties related to inner ear structure
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome.
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Specialists
View all specialists →No specialists are currently listed for X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What type of hearing device is best for my child's specific ear anatomy, and when should we start?,Should we pursue genetic testing, and which gene or genes should be tested?,What are the risks and benefits of surgery to reconstruct the ear canal in our situation?,What early intervention services — such as speech therapy — should we start right away?,What educational accommodations will my child likely need at school?,What is the chance that other family members or future children could be affected?,Are there any specialists or centers with experience in this specific condition that you would recommend?
Common questions about X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome
What is X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome?
X-linked external auditory canal atresia with dilated internal auditory canal and facial dysmorphism syndrome is a very rare genetic condition that mainly affects the ears and facial features. 'Atresia' means that the ear canal — the tube that carries sound from the outside of the ear to the eardrum — is blocked or did not form properly. At the same time, the internal auditory canal, which is a bony channel deep inside the skull that carries important nerves for hearing and balance, is unusually wide (dilated). Together, these ear problems cause significant hearing loss from birth. People with
How is X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome inherited?
X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome follows a x-linked recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome typically begin?
Typical onset of X-linked external auditory canal atresia-dilated internal auditory canal-facial dysmorphism syndrome is neonatal. Age of onset can vary across affected individuals.