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Living with Pseudodiastrophic dysplasia

A very rare bone growth condition with short upper limbs, clubfeet, and joint dislocations, seen from birth.

Understanding Pseudodiastrophic dysplasia

Pseudodiastrophic dysplasia is a very rare bone growth condition marked by short upper arms and thighs and severe clubfoot.

It also involves dislocated elbow and finger joints, flattened spine bones, and scoliosis. It has been described in about 10 people. GARD says clubfoot can be treated with surgery, and physical therapy can ease contractures and scoliosis in newborns.

Signs & symptoms

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

  • Short upper arms and thighs (rhizomelia)
  • Clubfeet
  • Elbow dislocation
  • Flattened spine bones (platyspondyly)
  • Scoliosis
  • Flat cheekbones

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 autoimmune and inflammatory disease specialists, bone and joint specialists and genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

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

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); 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
What treatment options exist for the clubfeet?
How can physical therapy help with contractures and scoliosis?
Is genetic testing or counseling available?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive

GARD says autosomal recessive inheritance has been suggested, meaning a child would inherit a changed copy of the gene from each parent. It doesn't name a gene.

Genetic

Patient organizations

Source: NIH GARD · Pseudodiastrophic dysplasiaGARD ID 9463 · 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 Pseudodiastrophic dysplasia.

Explore the Pseudodiastrophic dysplasia blog

Explore research for Pseudodiastrophic dysplasia

Explore actively recruiting Pseudodiastrophic dysplasia studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Pseudodiastrophic dysplasia 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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