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Living with Macrodactyly of toe

A condition present from birth in which one or more toes are larger than usual.

Understanding Macrodactyly of toe

Macrodactyly of toe is a rare condition in which one or more toes on a foot are enlarged from birth.

It is a type of limb overgrowth that is not part of a larger syndrome. The enlargement can involve some or all tissues of the toe. It may keep growing out of proportion, or stay in proportion. It can affect one foot or both. GARD says it usually starts in a newborn or infant.

Signs & symptoms

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

  • Enlarged toe or toes
  • Wide, long bones in the foot (broad metatarsal)
  • Foot turned inward toward the middle of the body
  • Enlarged ends of the toe bones
  • Bones of the foot and ankle that harden early
  • Abnormal hardening of the foot bones (metatarsal ossification)

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
Is my child's toe growth likely to keep progressing, or stay in proportion?
Which specialists should follow my child's foot growth?
Could the nerve in the affected toe be involved, and what does that mean?

Quick facts

Symptoms usually startNewborn and as an Infant

Changes in genes (also called variants) cause this condition. GARD does not name a specific gene.

Genetic

Also known as: foot macrodactyly; macrodactyly of foot; macrodactyly of toes

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Macrodactyly of toeGARD ID 6951 · 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 Macrodactyly of toe.

Explore the Macrodactyly of toe blog

Explore research for Macrodactyly of toe

Explore actively recruiting Macrodactyly of toe studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Macrodactyly of toe 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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