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Living with Dysspondyloenchondromatosis

A rare bone condition with multiple cartilage growths in the spine and long bones, leading to a curved spine and uneven leg length.

Understanding Dysspondyloenchondromatosis

Dysspondyloenchondromatosis is a rare bone condition with uneven spine bones and cartilage growths (enchondromas) in the spine and long bones.

People have multiple enchondromas, which are noncancerous cartilage growths inside the bones. These can lead to a curved spine (kyphoscoliosis) and legs of different lengths. Other features can include flattened spine bones, loose joints, enlarged joints, short height, and knock knees. Signs show up in the newborn and infant years.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Cartilage growths in the bones (enchondromas)
  • Curved spine (kyphoscoliosis, scoliosis)
  • Legs of different length or width
  • Flattened spine bones (platyspondyly)
  • Loose, easily dislocated joints
  • Short height

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include bone and joint specialists and genetic specialists.

  3. Consider genetic testing

    Changes in COL2A1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Little People of America may keep lists of experts for this condition.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists)
Expert care
Expert lists: Little People of America
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Little People of America
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Would genetic testing for the COL2A1 gene help our family?
How should the spine and leg length be monitored?
What treatments or surgery might help with joint problems?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant
GenesCOL2A1

GARD says changes in the COL2A1 gene cause this condition. It is autosomal dominant, meaning one changed copy of the gene can cause it.

Genetic

Patient organizations

Source: NIH GARD · DysspondyloenchondromatosisGARD ID 19051 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Dysspondyloenchondromatosis.

Explore the Dysspondyloenchondromatosis blog

Explore research for Dysspondyloenchondromatosis

Explore actively recruiting Dysspondyloenchondromatosis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Dysspondyloenchondromatosis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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