Overview
X-linked intellectual disability-spastic quadriparesis syndrome is an extremely rare genetic condition that primarily affects males. It is caused by a mutation on the X chromosome and leads to a combination of intellectual disability and spastic quadriparesis, which means stiffness and weakness affecting all four limbs. Children with this condition typically show delays in reaching developmental milestones such as sitting, crawling, and walking. The intellectual disability can range from moderate to severe, making it difficult for affected individuals to learn, communicate, and perform daily tasks independently. The spasticity (muscle stiffness) in the arms and legs can significantly limit movement and may worsen over time. Because this syndrome is so rare, there is limited information about its full range of symptoms and long-term outcomes. There is currently no cure for this condition. Treatment focuses on managing symptoms and improving quality of life. This typically includes physical therapy to help with mobility and reduce muscle stiffness, occupational therapy to support daily living skills, speech therapy for communication difficulties, and special education services. Medications may be used to manage spasticity, seizures if they occur, and other associated symptoms. A team of specialists working together provides the best care for affected individuals and their families.
Key symptoms:
Intellectual disabilityStiffness in all four limbs (spastic quadriparesis)Delayed motor milestones such as sitting and walkingDelayed speech and language developmentDifficulty with learning and problem-solvingIncreased muscle tone (hypertonia)Difficulty with fine motor skills like grasping objectsPossible seizuresDifficulty with coordination and balanceLimited ability to walk or move independentlyFeeding difficulties in infancyPossible abnormal reflexes
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for X-linked intellectual disability-spastic quadriparesis syndrome.
View clinical trials →Clinical Trials
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Specialists
View all specialists →No specialists are currently listed for X-linked intellectual disability-spastic quadriparesis 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 intellectual disability-spastic quadriparesis 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 genetic testing has been done, and are there additional tests that could help clarify the diagnosis?,What therapies do you recommend to help with my child's muscle stiffness and movement?,Are there medications that could help manage spasticity or other symptoms, and what are the side effects?,What should I watch for in terms of seizures or other complications?,What educational and developmental support services should we be accessing?,Is there any ongoing research or clinical trials that might be relevant to this condition?,Should other family members, especially females, be tested to see if they are carriers?
Common questions about X-linked intellectual disability-spastic quadriparesis syndrome
What is X-linked intellectual disability-spastic quadriparesis syndrome?
X-linked intellectual disability-spastic quadriparesis syndrome is an extremely rare genetic condition that primarily affects males. It is caused by a mutation on the X chromosome and leads to a combination of intellectual disability and spastic quadriparesis, which means stiffness and weakness affecting all four limbs. Children with this condition typically show delays in reaching developmental milestones such as sitting, crawling, and walking. The intellectual disability can range from moderate to severe, making it difficult for affected individuals to learn, communicate, and perform daily t
How is X-linked intellectual disability-spastic quadriparesis syndrome inherited?
X-linked intellectual disability-spastic quadriparesis 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 intellectual disability-spastic quadriparesis syndrome typically begin?
Typical onset of X-linked intellectual disability-spastic quadriparesis syndrome is infantile. Age of onset can vary across affected individuals.