Overview
X-linked intellectual disability-global developmental delay-facial dysmorphism-sacral caudal remnant syndrome is a very rare genetic condition that affects brain development, physical growth, and the structure of certain body parts. It is caused by a change (mutation) in a gene located on the X chromosome, which is why it mainly affects males, though females who carry the gene change may sometimes show milder features. The condition is sometimes referred to by its Orphanet code ORPHA:480907. People with this syndrome typically have intellectual disability, meaning they may have difficulty with learning, thinking, and problem-solving. They also experience global developmental delay, which means they reach milestones like sitting, walking, and talking later than expected. Distinctive facial features are common, and one of the most unique aspects of this condition is the presence of a sacral caudal remnant — a small, tail-like or bony structure near the base of the spine that forms during early fetal development. There is currently no cure for this syndrome. Treatment focuses on supporting development through therapies such as speech therapy, physical therapy, and occupational therapy. Educational support and regular monitoring by a team of specialists are important parts of care. Because this condition is extremely rare, much is still being learned about its full range of symptoms and long-term outlook.
Key symptoms:
Intellectual disability (difficulty with learning and thinking)Global developmental delay (reaching milestones like walking and talking later than expected)Distinctive facial features (such as differences in the shape of the eyes, nose, or ears)Sacral caudal remnant (a small tail-like or bony structure near the base of the spine)Delayed speech and language developmentDelayed motor skills (difficulty with movement and coordination)Low muscle tone (muscles that feel floppy or weak)Behavioral challenges
Clinical phenotype terms (45)— hover any for plain English
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome.
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View all trials with filters →No actively recruiting trials found for X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome at this time.
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Specialists
View all specialists →No specialists are currently listed for X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant 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-global development delay-facial dysmorphism-sacral caudal remnant 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.Which specific gene is thought to cause this condition in my child, and has it been confirmed by genetic testing?,What therapies should we start right away, and how often should my child receive them?,Does the sacral caudal remnant need surgery or any special monitoring?,Are there any other health problems we should watch for as my child grows?,Should other family members be tested to see if they carry the gene change?,Are there any clinical trials or research studies we could participate in?,What educational and community support services are available for my child?
Common questions about X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome
What is X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome?
X-linked intellectual disability-global developmental delay-facial dysmorphism-sacral caudal remnant syndrome is a very rare genetic condition that affects brain development, physical growth, and the structure of certain body parts. It is caused by a change (mutation) in a gene located on the X chromosome, which is why it mainly affects males, though females who carry the gene change may sometimes show milder features. The condition is sometimes referred to by its Orphanet code ORPHA:480907. People with this syndrome typically have intellectual disability, meaning they may have difficulty wit
How is X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome inherited?
X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant 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-global development delay-facial dysmorphism-sacral caudal remnant syndrome typically begin?
Typical onset of X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome is neonatal. Age of onset can vary across affected individuals.