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Living with Progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndrome

A rare genetic syndrome with developmental delay, intellectual disability, hand tremor, and behavior changes.

Understanding Progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndrome

Progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndrome is a rare genetic syndrome with intellectual disability and hand tremor.

It causes global developmental delay, moderate to severe intellectual disability, and trouble with movement and language. Behavior changes can include mood swings, aggression, and self-harm. The hand tremor gets worse over time. Certain facial features are also common. GARD lists onset in the teen years or adulthood.

Signs & symptoms

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

  • Delays in development
  • Severe intellectual disability
  • Hand tremor
  • Poor speech
  • Aggressive behavior and mood swings
  • Waddling walk

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 SLC6A17 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 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 genetic testing for the SLC6A17 gene help our family?
What supports can help with speech and learning?
What can help with the tremor and behavior changes?

Quick facts

Symptoms usually startTeenager and as an Adult
InheritanceAutosomal Recessive
GenesSLC6A17

This condition is caused by changes in the SLC6A17 gene. A child inherits a changed copy of the gene from each parent (autosomal recessive).

GeneticNeurological

Also known as: intellectual developmental disorder, autosomal recessive 48; intellectual disability, autosomal recessive type 48; progressive essential tremor, speech impairment, facial dysmorphism, intellectual disability, abnormal behavior syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndromeGARD ID 17798 · 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 Progressive essential tremor-speech impairment-facial dysmorphism-intellectual disability-abnormal behavior syndrome.

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