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Living with Intellectual disability-spasticity-ectrodactyly syndrome

A rare syndrome with severe intellectual disability, leg stiffness and weakness, and hand and foot differences.

Understanding Intellectual disability-spasticity-ectrodactyly syndrome

Intellectual disability-spasticity-ectrodactyly syndrome is a rare syndrome with severe intellectual disability, stiff legs, and differences in the hands and feet.

Leg muscles are stiff and also waste away (spastic paraplegia). The hands and feet can have missing or split digits (ectrodactyly), joined fingers (syndactyly), or curved fingers (clinodactyly). It begins in the newborn period or infancy.

Signs & symptoms

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

  • Intellectual disability
  • Strong reflexes
  • Joined fingers (syndactyly)
  • Single crease across the palms
  • Differences in the upper limbs
  • Differences in the hip bones

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, brain and nervous system 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); Brain and nervous system specialists (neurologists); 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
What therapies help with leg stiffness and mobility?
Should a hand and foot specialist follow my child?
Can genetic testing help find the cause?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD doesn't describe a cause for this condition yet.

GeneticNeurological

Also known as: jancar syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Intellectual disability-spasticity-ectrodactyly syndromeGARD ID 3523 · 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 Intellectual disability-spasticity-ectrodactyly syndrome.

Explore the Intellectual disability-spasticity-ectrodactyly syndrome blog

Explore research for Intellectual disability-spasticity-ectrodactyly syndrome

Explore actively recruiting Intellectual disability-spasticity-ectrodactyly syndrome studies with HealthSpark.

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Find actively recruiting studies for Intellectual disability-spasticity-ectrodactyly syndrome 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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