Overview
X-linked spinocerebellar ataxia type 4 (also called SCAX4) is a very rare inherited neurological condition that primarily affects the cerebellum, the part of the brain responsible for coordinating movement and balance. Because it follows an X-linked pattern of inheritance, it mainly affects males, though females who carry the gene change may sometimes show milder symptoms. People with this condition typically develop problems with coordination and balance (ataxia), which tend to worsen over time. Walking may become unsteady, and fine motor tasks like writing or buttoning clothes can become difficult. Additional features may include involuntary eye movements (nystagmus), slurred speech, and progressive difficulty with movement control. The severity and age of onset can vary among affected individuals. Because this is an extremely rare condition, there is currently no specific cure or disease-modifying treatment available. Management focuses on supportive care, including physical therapy to maintain mobility, occupational therapy to help with daily tasks, and speech therapy if speech is affected. A team of specialists, particularly neurologists and geneticists, typically guides care for affected individuals.
Also known as:
Key symptoms:
Unsteady walking and poor balanceDifficulty coordinating movementsInvoluntary eye movements (nystagmus)Slurred or slow speechDifficulty with fine motor tasks like writingProgressive worsening of coordinationMuscle stiffness or spasticityTremorDifficulty swallowingFatigue
Clinical phenotype terms (7)— hover any for plain English
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for X-linked spinocerebellar ataxia type 4.
View clinical trials →Clinical Trials
View all trials with filters →No actively recruiting trials found for X-linked spinocerebellar ataxia type 4 at this time.
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Specialists
View all specialists →No specialists are currently listed for X-linked spinocerebellar ataxia type 4.
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 spinocerebellar ataxia type 4.
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.How quickly is this condition likely to progress in my case or my child's case?,What therapies should we start right away to maintain function as long as possible?,Are there any clinical trials or research studies we could participate in?,Should other family members be tested, especially females who might be carriers?,What assistive devices or home modifications should we plan for?,How often should we schedule follow-up appointments and brain imaging?,Are there any medications that could help manage specific symptoms like stiffness or tremor?
Common questions about X-linked spinocerebellar ataxia type 4
What is X-linked spinocerebellar ataxia type 4?
X-linked spinocerebellar ataxia type 4 (also called SCAX4) is a very rare inherited neurological condition that primarily affects the cerebellum, the part of the brain responsible for coordinating movement and balance. Because it follows an X-linked pattern of inheritance, it mainly affects males, though females who carry the gene change may sometimes show milder symptoms. People with this condition typically develop problems with coordination and balance (ataxia), which tend to worsen over time. Walking may become unsteady, and fine motor tasks like writing or buttoning clothes can become di
How is X-linked spinocerebellar ataxia type 4 inherited?
X-linked spinocerebellar ataxia type 4 follows a x-linked recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.