Living with Intellectual disability-hyperkinetic movement-truncal ataxia syndrome
A rare genetic syndrome with developmental delay, intellectual disability, balance problems, and jerky or flowing movements.
Understanding Intellectual disability-hyperkinetic movement-truncal ataxia syndrome
Features include a small head, poor balance of the trunk (truncal ataxia), and uncontrolled, flowing movements (chorea). Blood creatine kinase levels are high. Some people also have mild brain shrinkage, weakness, seizures, or eye differences. It begins in childhood.
Signs & symptoms
Symptoms vary from person to person. GARD lists these among the most common:
- Global developmental delay
- Chorea (flowing, jerky movements)
- Hyperactive movements
- Unsteady walk
- Cataracts
- Muscle tiredness with exercise
Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.
Diagnosis
- 1Talk with your doctor
Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.
- 2See a specialist
Specialists who may be involved include brain and nervous system specialists and genetic specialists.
- 3Consider genetic testing
Changes in TRAPPC11 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
Quick facts
Changes in the TRAPPC11 gene cause this condition. It is inherited in an autosomal recessive pattern, meaning a child inherits a changed copy of the gene from each parent.
Also known as: intellectual disability, hyperkinetic movement, truncal ataxia syndrome
Patient organizations
Rare-disease groups that can help
- Global GenesRare Diseases · United States
- National Organization for Rare DisordersRare Diseases · United States
- Genetic AllianceRare Diseases · United States
- RARE FoundationRare Diseases · United States
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Perspectives from people navigating life with Intellectual disability-hyperkinetic movement-truncal ataxia syndrome.
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