Overview
Spondyloepimetaphyseal dysplasia, Isidor-Toutain type (sometimes called SEMD Isidor-Toutain type) is an extremely rare genetic skeletal disorder that affects the development of bones, particularly the spine (spondylo-), the ends of long bones (epiphyseal), and the areas near the growth plates of long bones (metaphyseal). This condition belongs to a broader group of bone growth disorders known as spondyloepimetaphyseal dysplasias. People with this condition typically show signs of short stature from early childhood, along with abnormalities in the shape and structure of the vertebrae (bones of the spine), which can lead to spinal curvature or other spinal problems. The long bones of the arms and legs may also develop abnormally, leading to limb shortening and joint problems. Additional features may include delayed bone maturation, joint stiffness or laxity, and waddling gait. Some individuals may also experience mild facial differences. Because this condition is so rare, with only a handful of cases described in the medical literature, treatment options are largely supportive and symptomatic. There is currently no cure or disease-specific therapy. Management focuses on orthopedic care, physical therapy, pain management, and monitoring for complications such as spinal cord compression or progressive joint problems. A multidisciplinary team of specialists is typically needed to provide comprehensive care.
Key symptoms:
Short statureAbnormal shape of the spinal bones (vertebral anomalies)Short limbs compared to the trunkJoint stiffness or limited range of motionWaddling gait or difficulty walkingDelayed bone developmentSpinal curvature (scoliosis or kyphosis)Flat or irregular growth plates visible on X-rayMild facial differencesBowed legs or knock kneesJoint pain or discomfort
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Childhood
Begins in childhood, roughly ages 1 to 12
Treatments
No FDA-approved treatments are currently listed for Spondyloepimetaphyseal dysplasia, Isidor-Toutain type.
View clinical trials →Clinical Trials
View all trials with filters →No actively recruiting trials found for Spondyloepimetaphyseal dysplasia, Isidor-Toutain type at this time.
New trials open frequently. Follow this disease to get notified.
Specialists
View all specialists →No specialists are currently listed for Spondyloepimetaphyseal dysplasia, Isidor-Toutain type.
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 Spondyloepimetaphyseal dysplasia, Isidor-Toutain type.
Community
No community posts yet. Be the first to share your experience with Spondyloepimetaphyseal dysplasia, Isidor-Toutain type.
Start the conversation →Latest news about Spondyloepimetaphyseal dysplasia, Isidor-Toutain type
No recent news articles for Spondyloepimetaphyseal dysplasia, Isidor-Toutain type.
Follow this condition to be notified when news becomes available.
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.How severe is my child's skeletal involvement, and what changes should we expect over time?,How often should we have skeletal X-rays or other imaging done?,What physical activities are safe, and are there any we should avoid?,Should we see a spine specialist to monitor for spinal cord compression?,Are there any clinical trials or research studies we could participate in?,What school or workplace accommodations would you recommend?,Is genetic counseling recommended for our family regarding future pregnancies?
Common questions about Spondyloepimetaphyseal dysplasia, Isidor-Toutain type
What is Spondyloepimetaphyseal dysplasia, Isidor-Toutain type?
Spondyloepimetaphyseal dysplasia, Isidor-Toutain type (sometimes called SEMD Isidor-Toutain type) is an extremely rare genetic skeletal disorder that affects the development of bones, particularly the spine (spondylo-), the ends of long bones (epiphyseal), and the areas near the growth plates of long bones (metaphyseal). This condition belongs to a broader group of bone growth disorders known as spondyloepimetaphyseal dysplasias. People with this condition typically show signs of short stature from early childhood, along with abnormalities in the shape and structure of the vertebrae (bones of
How is Spondyloepimetaphyseal dysplasia, Isidor-Toutain type inherited?
Spondyloepimetaphyseal dysplasia, Isidor-Toutain type follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Spondyloepimetaphyseal dysplasia, Isidor-Toutain type typically begin?
Typical onset of Spondyloepimetaphyseal dysplasia, Isidor-Toutain type is childhood. Age of onset can vary across affected individuals.