Overview
Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome is a very rare genetic condition that affects multiple body systems at the same time. It is sometimes referred to by its Orphanet code ORPHA:508533. The condition causes problems with bone growth and structure (skeletal dysplasia), a weakened immune system due to low numbers or poor function of T-cells (a type of white blood cell that fights infection), and delays in reaching developmental milestones such as talking, walking, and learning. Children with this syndrome often have unusual bone features that can be seen on X-rays, and they may look different from other children in terms of body proportions or facial features. Because their immune system does not work properly, they are more likely to get serious infections that healthy children would fight off easily. Developmental delays can range from mild to more significant, affecting both physical and intellectual growth. Treatment is focused on managing symptoms rather than curing the disease. This may include physical therapy to help with movement, immunological support to reduce infection risk (such as immunoglobulin replacement or preventive antibiotics), and educational support for developmental challenges. A team of specialists is usually needed to care for all aspects of this complex condition.
Also known as:
Key symptoms:
Abnormal bone growth and structure (skeletal dysplasia)Short stature or unusual body proportionsWeakened immune system with frequent or severe infectionsLow levels or poor function of T-cells (immune cells)Delayed developmental milestones such as sitting, walking, or talkingIntellectual disability or learning difficultiesUnusual facial featuresIncreased vulnerability to bacterial, viral, or fungal infectionsJoint problems or limited range of motionMuscle weakness or low muscle tone
Clinical phenotype terms (50)— hover any for plain English
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 Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome.
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Specialists
View all specialists →No specialists are currently listed for Skeletal dysplasia-T-cell immunodeficiency-developmental delay 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 Skeletal dysplasia-T-cell immunodeficiency-developmental delay 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 genetic testing do you recommend to confirm the diagnosis and identify the specific gene involved?,How severe is my child's immune deficiency, and what is the best way to protect them from infections?,Should we consider a bone marrow transplant, and if so, when would be the right time?,What therapies (physical, occupational, speech) should my child start, and how often?,Are there any clinical trials or research studies we could participate in?,What signs of infection or other complications should prompt an emergency visit?,Are other family members at risk, and should siblings or parents be tested?
Common questions about Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome
What is Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome?
Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome is a very rare genetic condition that affects multiple body systems at the same time. It is sometimes referred to by its Orphanet code ORPHA:508533. The condition causes problems with bone growth and structure (skeletal dysplasia), a weakened immune system due to low numbers or poor function of T-cells (a type of white blood cell that fights infection), and delays in reaching developmental milestones such as talking, walking, and learning. Children with this syndrome often have unusual bone features that can be seen on X-
How is Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome inherited?
Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome typically begin?
Typical onset of Skeletal dysplasia-T-cell immunodeficiency-developmental delay syndrome is neonatal. Age of onset can vary across affected individuals.