X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome

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ORPHA:480907OMIM:300966Q87.0
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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
Severe expressive language delayHP:0006863Abnormal sacral segmentationHP:0008468Prominent protruding coccyxHP:0008472
Inheritance

X-linked recessive

Carried on the X chromosome; typically affects males more than females

Age of Onset

Neonatal

Begins at or shortly after birth (first 4 weeks)

Orphanet ↗OMIM ↗NORD ↗

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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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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No specialists are currently listed for X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome.

View NORD Rare Disease Centers ↗Undiagnosed Disease Network ↗

Treatment Centers

8 centers
🏥 NORD

Baylor College of Medicine Rare Disease Center

Baylor College of Medicine

📍 Houston, TX

🏥 NORD

Stanford Medicine Rare Disease Center

Stanford Medicine

📍 Stanford, CA

🔬 UDN

NIH Clinical Center Undiagnosed Diseases Program

National Institutes of Health

📍 Bethesda, MD

🔬 UDN

UCLA UDN Clinical Site

UCLA Health

📍 Los Angeles, CA

🔬 UDN

Baylor College of Medicine UDN Clinical Site

Baylor College of Medicine

📍 Houston, TX

🔬 UDN

Harvard/MGH UDN Clinical Site

Massachusetts General Hospital

📍 Boston, MA

🏥 NORD

Mayo Clinic Center for Individualized Medicine

Mayo Clinic

📍 Rochester, MN

👤 Mayo Clinic Center for Individualized Medicine

🏥 NORD

UCLA 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.

Search all travel grants →NORD Financial Assistance ↗

Community

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Latest news about X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome

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Caregiver Resources

NORD Caregiver Resources

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Social Security Disability

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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.