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Living with X-linked progressive cerebellar ataxia

A rare, slowly worsening X-linked condition with poor coordination and balance, starting in childhood, with normal intelligence.

Understanding X-linked progressive cerebellar ataxia

X-linked progressive cerebellar ataxia is a rare X-linked ataxia (poor coordination) with slow progression and normal intelligence.

It begins in the first or second decade of life. Features include unsteady walking, shaky and uncoordinated limb movements, slurred speech, and quick eye movements. High-arched feet, scoliosis, muscle wasting, and nerve problems in the limbs have also been described.

Signs & symptoms

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

  • Poor coordination (ataxia)
  • Unsteady walking and frequent falls
  • Tremor when reaching (intention tremor)
  • Quick, jerky eye movements (nystagmus)
  • High-arched feet
  • Nerve damage with weakness and numbness

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 ATP2B3 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    National Ataxia Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: National Ataxia Foundation
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 National Ataxia 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
Could ATP2B3 genetic testing help our family?
What therapies can help with balance and coordination?
Which specialists should follow my care?

Quick facts

Symptoms usually startChild
InheritanceX-Linked
GenesATP2B3

X-linked progressive cerebellar ataxia is caused by changes in the ATP2B3 gene and follows X-linked inheritance.

GeneticNeurological

Also known as: olivopontocerebellar atrophy, x-linked; opca, x-linked; spinocerebellar ataxia, x-linked 1; spinocerebellar ataxia, x-linked 1, x-linked recessive; spinocerebellar ataxia, x-linked type 1

Patient organizations

Broader rare-disease groups

Source: NIH GARD · X-linked progressive cerebellar ataxiaGARD ID 16558 · 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 X-linked progressive cerebellar ataxia.

Explore the X-linked progressive cerebellar ataxia blog

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Explore actively recruiting X-linked progressive cerebellar ataxia studies with HealthSpark.

HealthSpark

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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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