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Living with Genochondromatosis type 2

A rare genetic bone condition with cartilage growths in the thigh, arm, wrist, hand, and foot bones that fade later in life.

Understanding Genochondromatosis type 2

Genochondromatosis type 2 is a rare genetic bone development disorder with cartilage growths (enchondromas) in several bones.

The collarbones are normal. Symmetrical growths are found especially in the lower thigh bone, upper arm bone, and the bones of the wrists, hands, and feet. GARD says the growths regress later in life, and clinical examination is normal and the course is benign. It is usually noticed in childhood.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary describes cartilage growths in the bones.

  • Cartilage growths (enchondromas) in several bones
  • Normal collarbones

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
Can genetic testing confirm the diagnosis?
How long should the bones be monitored?
What is the difference between type 1 and type 2?

Quick facts

Symptoms usually startChild

Changes in genes cause this condition. GARD does not name the gene or describe how it is inherited.

Genetic

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Genochondromatosis type 2GARD ID 16820 · 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 Genochondromatosis type 2.

Explore the Genochondromatosis type 2 blog

Explore research for Genochondromatosis type 2

Explore actively recruiting Genochondromatosis type 2 studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Genochondromatosis type 2 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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