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Living with Intellectual disability, autosomal dominant 47

A rare genetic condition with developmental delay, facial differences, and feeding or reflux problems.

Understanding Intellectual disability, autosomal dominant 47

Intellectual disability, autosomal dominant 47 is a rare genetic syndrome with global developmental delay and varying intellectual disability.

Facial features can include a high nasal bridge, deep-set eyes, and a wide mouth. Feeding difficulties and acid reflux are common. Seizures, low muscle tone, autistic features, and loose joints have also been reported. It begins during pregnancy, at birth, or in infancy.

Signs & symptoms

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

  • Global developmental delay
  • Intellectual disability
  • Feeding difficulties
  • Acid reflux
  • Autistic behavior
  • Deep-set eyes

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 and genetic specialists.

  3. Consider genetic testing

    Changes in STAG1 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); 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 STAG1 Gene Foundation
  • 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 for the STAG1 gene confirm the diagnosis?
How can we ease feeding problems and reflux?
Which therapies help with development?

Quick facts

Symptoms usually startduring Pregnancy, at Birth, and as an Infant
InheritanceAutosomal Dominant
GenesSTAG1

Changes in the STAG1 gene cause this condition. It is inherited in an autosomal dominant pattern, meaning one changed copy of the gene can be enough.

GeneticNeurological

Also known as: intellectual developmental disorder, autosomal dominant 47; stag1-related intellectual disability-facial dysmorphism-gastroesophageal reflux syndrome

Patient organizations

Source: NIH GARD · Intellectual disability, autosomal dominant 47GARD ID 17935 · 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, autosomal dominant 47.

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