Overview
Pontocerebellar hypoplasia type 8 (PCH8) is an extremely rare genetic brain disorder that affects the development of the brain, particularly the cerebellum (the part of the brain that controls movement and balance) and the pons (a structure in the brainstem that connects different parts of the brain). In this condition, these brain structures are smaller than normal, which is called hypoplasia. PCH8 is caused by mutations in the CHMP1A gene. Babies with PCH8 typically show signs from birth or very early infancy. Common features include severe intellectual disability, very limited or absent motor development, small head size (microcephaly), muscle tone problems, seizures, and vision difficulties. Many affected children do not reach typical developmental milestones such as sitting, walking, or speaking. Feeding difficulties are also common and may require special support. There is currently no cure for PCH8. Treatment focuses on managing symptoms and improving quality of life. This may include anti-seizure medications, physical therapy, occupational therapy, and nutritional support. Because the condition is so rare, research is still ongoing to better understand the disease and develop potential therapies. A team of specialists is usually needed to provide comprehensive care for affected individuals.
Also known as:
Key symptoms:
Very small head size (microcephaly)Severe intellectual disabilityInability to sit, walk, or reach motor milestonesSeizures or epilepsyAbnormal muscle tone (too stiff or too floppy)Feeding difficultiesVision problems or visual impairmentAbsent or very limited speechInvoluntary movementsPoor growth and failure to thriveBreathing difficultiesIrritability or excessive cryingUnderdeveloped cerebellum visible on brain imaging
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Pontocerebellar hypoplasia type 8.
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Specialists
View all specialists →No specialists are currently listed for Pontocerebellar hypoplasia type 8.
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 Pontocerebellar hypoplasia type 8.
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 is the expected course of this condition for my child specifically?,What seizure medications are recommended, and what side effects should I watch for?,Does my child need a feeding tube, and how will nutrition be managed?,What therapies (physical, occupational, speech) are recommended and how often?,Should we consider palliative care services, and what does that involve?,What is the chance of having another child with this condition, and is genetic counseling available?,Are there any clinical trials or research studies we could participate in?
Common questions about Pontocerebellar hypoplasia type 8
What is Pontocerebellar hypoplasia type 8?
Pontocerebellar hypoplasia type 8 (PCH8) is an extremely rare genetic brain disorder that affects the development of the brain, particularly the cerebellum (the part of the brain that controls movement and balance) and the pons (a structure in the brainstem that connects different parts of the brain). In this condition, these brain structures are smaller than normal, which is called hypoplasia. PCH8 is caused by mutations in the CHMP1A gene. Babies with PCH8 typically show signs from birth or very early infancy. Common features include severe intellectual disability, very limited or absent mo
How is Pontocerebellar hypoplasia type 8 inherited?
Pontocerebellar hypoplasia type 8 follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Pontocerebellar hypoplasia type 8 typically begin?
Typical onset of Pontocerebellar hypoplasia type 8 is neonatal. Age of onset can vary across affected individuals.