Overview
Overgrowth or tall stature syndrome with skeletal involvement is a broad group of rare genetic conditions where the body grows more than expected — resulting in unusually tall height, large body size, and changes in the bones and skeleton. These conditions are sometimes called 'overgrowth syndromes' and can affect children from birth or early childhood onward. The skeleton may show differences such as unusually long limbs, large hands and feet, curved spine, or joints that are too flexible or too stiff. Some people also experience differences in facial features, intellectual development, or organ size. Because this is a category that includes several distinct syndromes — such as Sotos syndrome, Weaver syndrome, Beckwith-Wiedemann syndrome, and others — the exact symptoms and severity can vary widely from person to person. Some individuals live full, independent lives with mild features, while others may need ongoing support for learning differences, joint problems, or other health concerns. Treatment is focused on managing specific symptoms rather than curing the underlying condition. This typically involves a team of specialists including geneticists, orthopedic doctors, and developmental pediatricians. Early diagnosis and regular monitoring are key to helping people with these conditions live as well as possible.
Key symptoms:
Unusually tall height or large body size for ageLarge head size (macrocephaly)Long arms and legs compared to the rest of the bodyLarge hands and feetCurved or twisted spine (scoliosis or kyphosis)Joints that are overly flexible or, in some cases, stiffDistinctive facial features such as a prominent forehead or widely spaced eyesLearning difficulties or intellectual disability in some casesDelayed speech or language developmentOvergrowth of internal organs in some subtypesIncreased risk of certain tumors in some syndromesFlat feet or other foot shape differencesMuscle tone that is lower than normal (hypotonia)
Variable
Can be inherited in different ways depending on the underlying gene
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Overgrowth or tall stature syndrome with skeletal involvement.
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Specialists
View all specialists →No specialists are currently listed for Overgrowth or tall stature syndrome with skeletal involvement.
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 Overgrowth or tall stature syndrome with skeletal involvement.
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 overgrowth syndrome does my child have, and what does that mean for their future?,What genetic tests should be done, and should other family members be tested?,Does this syndrome carry a risk of tumors, and if so, what screening do we need?,What specialists should be part of our care team, and how often should we see each one?,Are there any clinical trials or new treatments we should know about?,What signs or symptoms should prompt us to seek emergency care?,What educational or developmental support should we put in place now?
Common questions about Overgrowth or tall stature syndrome with skeletal involvement
What is Overgrowth or tall stature syndrome with skeletal involvement?
Overgrowth or tall stature syndrome with skeletal involvement is a broad group of rare genetic conditions where the body grows more than expected — resulting in unusually tall height, large body size, and changes in the bones and skeleton. These conditions are sometimes called 'overgrowth syndromes' and can affect children from birth or early childhood onward. The skeleton may show differences such as unusually long limbs, large hands and feet, curved spine, or joints that are too flexible or too stiff. Some people also experience differences in facial features, intellectual development, or or