Overview
Weiss-Kruszka Syndrome is a rare genetic condition caused by changes (variants) in the KAT6A gene. It is also sometimes called KAT6A Syndrome. This condition affects many parts of the body and development, and it is present from birth. The brain and nervous system are most commonly affected, leading to intellectual disability that can range from mild to severe, as well as delays in reaching developmental milestones like sitting, walking, and talking. Many children with this syndrome have little or no speech, which can be one of the most challenging aspects of the condition for families. Beyond brain development, Weiss-Kruszka Syndrome can also affect the heart, eyes, and facial features. Some children are born with heart defects that may need surgery. Feeding difficulties are very common in infancy, and many babies need special feeding support. Distinctive facial features, such as a small head size, widely spaced eyes, and a small mouth, are often noticed by doctors. There is currently no cure for Weiss-Kruszka Syndrome. Treatment focuses on managing symptoms and supporting development. This includes speech therapy, occupational therapy, physical therapy, and special education programs. Heart defects are treated as needed, sometimes with surgery. With the right support, many individuals with this syndrome can make meaningful developmental progress over time.
Also known as:
Key symptoms:
Intellectual disability ranging from mild to severeLittle or no speech (expressive language delay)Delayed developmental milestones such as sitting and walkingFeeding difficulties in infancyCongenital heart defectsSmall head size (microcephaly)Widely spaced eyesSmall or narrow mouthHearing lossVision problemsBehavioral challenges such as anxiety or repetitive behaviorsSeizures in some individualsGastroesophageal reflux (stomach acid coming back up)Low muscle tone (hypotonia)Short stature
Clinical phenotype terms (29)— hover any for plain English
Autosomal dominant
Passed on from just one parent; each child has about a 50% chance of inheriting it
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Weiss-Kruszka Syndrome.
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Specialists
View all specialists →No specialists are currently listed for Weiss-Kruszka 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 Weiss-Kruszka 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 specific change was found in my child's KAT6A gene, and what does that mean for their prognosis?,Should other family members be tested for this gene change?,What therapies should we start right away, and how often should they happen?,Does my child need a heart evaluation, and how often should it be repeated?,What communication tools or AAC devices would you recommend for my child?,Are there any clinical trials or research studies we could participate in?,What signs or symptoms should prompt me to seek emergency care?
Common questions about Weiss-Kruszka Syndrome
What is Weiss-Kruszka Syndrome?
Weiss-Kruszka Syndrome is a rare genetic condition caused by changes (variants) in the KAT6A gene. It is also sometimes called KAT6A Syndrome. This condition affects many parts of the body and development, and it is present from birth. The brain and nervous system are most commonly affected, leading to intellectual disability that can range from mild to severe, as well as delays in reaching developmental milestones like sitting, walking, and talking. Many children with this syndrome have little or no speech, which can be one of the most challenging aspects of the condition for families. Beyon
How is Weiss-Kruszka Syndrome inherited?
Weiss-Kruszka Syndrome follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Weiss-Kruszka Syndrome typically begin?
Typical onset of Weiss-Kruszka Syndrome is neonatal. Age of onset can vary across affected individuals.