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Living with Epiphyseal dysplasia, multiple, 6

An inherited bone growth condition causing joint pain after activity and early joint wear.

Understanding Epiphyseal dysplasia, multiple, 6

Epiphyseal dysplasia, multiple, 6 is an inherited bone condition that affects the ends of the long bones.

In early childhood, it usually shows up as hip or knee pain after exercise. Children may tire with long walks and may waddle. Adult height is in the lower normal range or mildly short, with limbs short compared to the trunk. Joint pain and deformity can progress and lead to early arthritis.

Signs & symptoms

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

  • Knee pain
  • Hip pain
  • Joint pain
  • Arthritis (osteoarthritis)
  • Irregular or small ends of long bones
  • Waddling walk

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

    Your doctor may refer you to a specialist who knows rare conditions.

  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
A doctor familiar with rare conditions, plus specialists as needed
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
How can I protect my joints as I grow?
Which specialist, such as an orthopedic doctor, should follow me?
Could this pass to my children?

Quick facts

InheritanceAutosomal Dominant

This condition is autosomal dominant, which means a change in one copy of the gene can cause it. GARD does not name the gene.

Also known as: col9a1 multiple epiphyseal dysplasia (disease); col9a1-related multiple epiphyseal dysplasia; epiphyseal dysplasia, multiple, type 6; multiple epiphyseal dysplasia (disease) caused by mutation in col9a1

Patient organizations

Source: NIH GARD · Epiphyseal dysplasia, multiple, 6GARD ID 13376 · 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 Epiphyseal dysplasia, multiple, 6.

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