Overview
Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation is an extremely rare brain development disorder caused by changes in the TUBB3 gene. This gene provides instructions for making a protein called beta-tubulin, which is essential for building the internal scaffolding (called microtubules) that brain cells need to grow, move into the right position, and connect with each other during fetal development. When this gene is not working properly, the brain does not form correctly. This condition affects two main parts of the brain. First, the cerebral cortex — the outer layer of the brain responsible for thinking, movement, and sensation — develops abnormally, a problem called cortical dysgenesis. Second, the pons and cerebellum, which are structures at the base of the brain that control balance, coordination, and many automatic body functions, are unusually small. This is called pontocerebellar hypoplasia. Children with this condition typically have severe intellectual disability, problems with movement and coordination, seizures, difficulty feeding, and limited or absent speech. Some children may also have vision problems due to abnormal eye movement control. Because the condition affects fundamental brain development, symptoms are present from birth or very early infancy. There is currently no cure, and treatment focuses on managing symptoms such as seizures, feeding difficulties, and physical therapy to support the best possible quality of life.
Key symptoms:
Severe intellectual disabilitySeizures or epilepsyVery small cerebellum and brainstemAbnormal brain structure visible on MRIDifficulty feeding or swallowingLittle or no speech developmentPoor muscle tone (floppiness) or stiffnessProblems with balance and coordinationAbnormal eye movementsDelayed or absent motor milestones like sitting or walkingMicrocephaly (small head size)Breathing difficultiesGrowth problemsVision impairment
Clinical phenotype terms (50)— 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)
FDA & Trial Timeline
1 eventTafinlar(r) Capsules a nd Mekinist(r) Tablets: FDA approved
MEKINIST is indicated, in combination with dabrafenib, for the treatment of patients with locally advanced or metastatic anaplastic thyroid cancer (ATC) with BRAF V600E mutation and with no satisfactory locoregional treatment options
Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.
Treatments
No FDA-approved treatments are currently listed for Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation.
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Specialists
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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 Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation.
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 TUBB3 mutation does my child have, and what does it mean for their prognosis?,What is the best plan for managing my child's seizures, and what should I do if a seizure lasts too long?,Does my child need a feeding tube, and how will we monitor their nutrition and growth?,What therapies (physical, occupational, speech) are recommended, and how often?,Is this mutation inherited or did it happen for the first time in my child? What does this mean for future pregnancies?,Are there any clinical trials or research studies my child might be eligible for?,What palliative or supportive care services are available to help our family?
Common questions about Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation
What is Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation?
Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation is an extremely rare brain development disorder caused by changes in the TUBB3 gene. This gene provides instructions for making a protein called beta-tubulin, which is essential for building the internal scaffolding (called microtubules) that brain cells need to grow, move into the right position, and connect with each other during fetal development. When this gene is not working properly, the brain does not form correctly. This condition affects two main parts of the brain. First, the cerebral cortex — the outer layer
How is Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation inherited?
Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation typically begin?
Typical onset of Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation is neonatal. Age of onset can vary across affected individuals.