What Are the RFC-1 Disorders?

RFC-1 disease, often referred to as CANVAS (Cerebellar Ataxia, Neuropathy, and Vestibular Areflexia Syndrome), is a group of progressive neurological disorders caused by a genetic change in the RFC-1 gene.

The condition affects the systems responsible for coordination, balance, and sensory feedback, leading to difficulties with walking stability and spatial awareness.

Although symptoms typically begin in mid-to-late adulthood, many individuals experience subtle signs for years before diagnosis.

The Role of the RFC-1 Gene

The RFC-1 gene helps maintain DNA integrity and normal nerve function.
In affected individuals, the gene contains an expanded repeating sequence—most commonly the AAGGG repeat—which interferes with normal cellular processes.

This primarily impacts:

  • The cerebellum (coordination center)

  • Peripheral sensory nerves

  • The vestibular system (balance organs of the inner ear)

Common Symptoms

Symptoms vary but often include:

  • Progressive imbalance or unsteady gait

  • Sensory neuropathy (numbness, tingling, reduced position sense)

  • Loss of vestibular function causing visual instability

  • Chronic dry cough that may precede neurologic symptoms

  • Increasing difficulty with coordination over time

The progression is typically slow but variable.

Inheritance

RFC-1 disease is inherited in an autosomal recessive pattern.
This means a person must inherit one altered copy of the gene from each parent to develop the condition.

Carriers usually do not have symptoms.

Diagnosis

Diagnosis involves a combination of clinical evaluation and testing, including:

  • Neurological examination

  • Vestibular and balance testing

  • Nerve conduction studies

  • Brain imaging

  • Genetic confirmation of an RFC-1 repeat expansion

Awareness of the condition has increased since its genetic discovery in 2019, but it remains underdiagnosed.

Management

There is currently no disease-modifying therapy, but supportive care can significantly improve function and quality of life.

Management strategies may include:

  • Physical and balance therapy

  • Vestibular rehabilitation

  • Mobility aids when appropriate

  • Fall-prevention planning

  • Symptom-targeted treatments

Research aimed at understanding disease mechanisms and developing therapies is ongoing.

Why Awareness Matters

Many individuals with RFC-1 disease spend years seeking answers before diagnosis.
Increasing awareness helps shorten this journey, improves access to supportive care, and accelerates progress toward treatments.

The RFC-1 Foundation works to connect patients, clinicians, and researchers to advance understanding and improve lives.