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Living with Tibia vara

A growth condition (Blount disease) in which the shin bone bows inward and slowly worsens.

Understanding Tibia vara

Tibia vara, also called Blount disease, is a growth disorder of the shin bone (tibia) that causes the lower leg to bow inward.

The bowing slowly worsens over time. Many young children have bowed legs that improve with age, but this is different. It can affect one or both legs and can shorten the leg. It starts in infancy or childhood and is linked to obesity and early walking.

Signs & symptoms

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

  • Bowed shin bone
  • Changes at the top end of the shin bone
  • Knee differences
  • Bone and cartilage growth problems (osteochondrosis)

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
How can we tell Blount disease from normal bowed legs?
Which specialists, such as an orthopedist, should we see?
How will the bowing be monitored over time?

Quick facts

Symptoms usually startInfant and as a Child
InheritanceAutosomal Recessive

GARD says the cause isn't well understood, but hereditary and genetic factors are likely involved. It is linked to obesity and early walking.

Genetic

Also known as: blount disease; blount's disease; familial infantile type osteochondrosis deformans tibiae; infantile tibia vara; juvenile osteochondrosis of proximal tibia; osteochondrosis deformans tibiae

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Tibia varaGARD ID 916 · 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 Tibia vara.

Explore the Tibia vara blog

Explore research for Tibia vara

Explore actively recruiting Tibia vara studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Tibia vara 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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