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Living with Armfield syndrome

A rare genetic condition passed on the X chromosome that affects learning, growth, and sometimes seizures and the eyes.

Understanding Armfield syndrome

Armfield syndrome is a rare X-linked genetic condition that causes intellectual disability, short stature, seizures, and small hands and feet.

Cataracts, glaucoma, and cleft palate have also been reported. Other features can include a broad forehead, a small lower jaw, and inguinal hernia. It is noticed in newborns and infants.

Signs & symptoms

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

  • Intellectual disability and delayed development
  • Seizures
  • Short stature
  • Small hands and feet
  • Cataracts or glaucoma
  • Cleft palate

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 brain and nervous system specialists, eye disease specialists and genetic specialists.

  3. Consider genetic testing

    Changes in FAM50A are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Eye disease specialists (ophthalmologists); 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
Would FAM50A testing help me understand the chance of passing this on?
How often should vision and eye pressure be checked?
What seizure care and therapies are right for my child?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceX-Linked
GenesFAM50A

GARD says changes in the FAM50A gene cause this condition. It is X-linked, meaning the gene is on the X chromosome.

GeneticNeurological

Also known as: armfield x-linked intellectual disability syndrome; intellectual developmental disorder, x-linked, syndromic, armfield type, x-linked recessive; intellectual disability syndrome, x-linked, armfield type; mental retardation syndrome, x-linked, armfield type, x-linked recessive; mrxsa; syndromic x-linked intellectual disability armfield type

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Armfield syndromeGARD ID 16742 · 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 Armfield syndrome.

Explore the Armfield syndrome blog

Explore research for Armfield syndrome

Explore actively recruiting Armfield syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Armfield syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
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  • 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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