Overview
Unclassified spondylometaphyseal dysplasia is a term that was previously used to describe a group of rare bone disorders that affect the spine (spondylo-) and the growing ends of long bones called metaphyses. This condition has been marked as 'obsolete' in medical classification systems, meaning that as genetic knowledge has advanced, cases once grouped under this label have been reclassified into more specific types of spondylometaphyseal dysplasia or related skeletal disorders. Spondylometaphyseal dysplasias as a group cause problems with bone growth and development, typically leading to short stature, abnormal curvature of the spine, and irregularities in the shape of the long bones in the arms and legs. Patients may also experience joint pain, limited range of motion, and waddling gait. Because this is an obsolete classification, if you or your child has been given this diagnosis, it is important to seek updated genetic evaluation. Modern genetic testing can often identify the specific subtype, which helps guide treatment decisions and gives a clearer picture of what to expect. Treatment is generally supportive and may include orthopedic interventions, physical therapy, and pain management. There is currently no cure for spondylometaphyseal dysplasias, but proper management can significantly improve quality of life.
Key symptoms:
Short statureAbnormal curvature of the spineBowed legs or knock kneesJoint stiffness or limited range of motionWaddling walkBack painIrregularly shaped bones on X-rayFlattened spinal bones (platyspondyly)Widened or irregular growth plates in long bonesDifficulty with physical activitiesHip pain or hip joint problemsDelayed growth in childhood
Variable
Can be inherited in different ways depending on the underlying gene
Childhood
Begins in childhood, roughly ages 1 to 12
Treatments
No FDA-approved treatments are currently listed for OBSOLETE: Unclassified spondylometaphyseal dysplasia.
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Specialists
View all specialists →No specialists are currently listed for OBSOLETE: Unclassified spondylometaphyseal dysplasia.
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 OBSOLETE: Unclassified spondylometaphyseal dysplasia.
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.Has my condition been reclassified into a specific subtype of spondylometaphyseal dysplasia?,Should I have updated genetic testing to get a more precise diagnosis?,What kind of bone or joint problems should I watch for as I grow older?,Are there any activities I should avoid to protect my joints and spine?,What therapies or treatments can help manage pain and improve mobility?,Is there a risk of spinal cord compression, and what warning signs should I look for?,Are there any clinical trials or research studies I might be eligible for?
Common questions about OBSOLETE: Unclassified spondylometaphyseal dysplasia
What is OBSOLETE: Unclassified spondylometaphyseal dysplasia?
Unclassified spondylometaphyseal dysplasia is a term that was previously used to describe a group of rare bone disorders that affect the spine (spondylo-) and the growing ends of long bones called metaphyses. This condition has been marked as 'obsolete' in medical classification systems, meaning that as genetic knowledge has advanced, cases once grouped under this label have been reclassified into more specific types of spondylometaphyseal dysplasia or related skeletal disorders. Spondylometaphyseal dysplasias as a group cause problems with bone growth and development, typically leading to sho
At what age does OBSOLETE: Unclassified spondylometaphyseal dysplasia typically begin?
Typical onset of OBSOLETE: Unclassified spondylometaphyseal dysplasia is childhood. Age of onset can vary across affected individuals.