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Living with Ulna metaphyseal dysplasia syndrome

A rare bone condition with swelling at the wrists and changes in forearm and hand bones, usually noticed in the teen years.

Understanding Ulna metaphyseal dysplasia syndrome

Ulna metaphyseal dysplasia syndrome is a rare bone condition that affects the ends of the ulna (a forearm bone) and bones in the hands and feet.

People usually have bony swelling at the wrists, with or without pain. The knees and ankles may be affected too. Other features that vary include flattened spine bones, delayed bone development, short stature, and hip differences. It usually appears in the teen years.

Signs & symptoms

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

  • Changes in the forearm bone (ulna)
  • Bony swelling at the wrists
  • Hand bone differences
  • Delayed bone maturation
  • Short stature
  • Spine and hip bone differences

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. Ask which tests can help

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

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 rare disease patient organizations for support
  • 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 counseling help our family?
Which specialists, such as an orthopedic specialist, should we see?
How should bone growth and wrist pain be monitored?

Quick facts

Symptoms usually startTeenager
InheritanceAutosomal Dominant

GARD says changes in genes (variants) cause this condition and that it is autosomal dominant, so one changed copy of a gene can be enough. It doesn't name a specific gene.

Genetic

Also known as: metaphyseal chondrodysplasia, rosenberg type; rosenberg-lohr syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Ulna metaphyseal dysplasia syndromeGARD ID 4740 · 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 Ulna metaphyseal dysplasia syndrome.

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HealthSpark

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  • Eligibility is confirmed by the study team

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