Skip to content
knowrare
HealthSignal
Your condition community

Living with Fatty acid hydroxylase-associated neurodegeneration

A progressive nervous system condition with movement and vision problems that begin in childhood or the teen years.

Understanding Fatty acid hydroxylase-associated neurodegeneration

Fatty acid hydroxylase-associated neurodegeneration (FAHN) is a progressive nervous system disorder with movement and vision problems that start in childhood or adolescence.

Changes in walking and frequent falls are usually the first signs. People gradually develop muscle stiffness (spasticity), muscle cramping (dystonia), or poor coordination (ataxia). Vision and speech can be affected, and swallowing may become hard. Some people need a wheelchair, and some have seizures or a decline in thinking skills.

Signs & symptoms

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

  • Changes in walking and frequent falls
  • Muscle stiffness and spasms (dystonia)
  • Poor coordination (ataxia)
  • Vision loss from optic nerve damage
  • Unclear speech (dysarthria)
  • Seizures

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, eye disease specialists and genetic specialists.

  3. Consider genetic testing

    Changes in FA2H 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

    Spastic Paraplegia Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Eye disease specialists (ophthalmologists); Genetic specialists (geneticists)
Expert care
Expert lists: Spastic Paraplegia 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 NBIA Disorders Association and other patient organizations
  • 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
Should we have genetic testing for the FA2H gene?
What therapies can help with movement and swallowing?
How often should vision and brain MRI be checked?

Quick facts

Symptoms usually startChild and as a Teenager
InheritanceAutosomal Recessive
GenesFA2H

Changes in the FA2H gene cause it. It is autosomal recessive, which means a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalInherited Metabolic

Also known as: dysmyelinating leukodystrophy and spastic paraparesis; fahn; fatty acid hydroxylase associated neurodegeneration; spastic paraplegia 35

Patient organizations

Source: NIH GARD · Fatty acid hydroxylase-associated neurodegenerationGARD ID 10810 · 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 Fatty acid hydroxylase-associated neurodegeneration.

Explore the Fatty acid hydroxylase-associated neurodegeneration blog

Explore research for Fatty acid hydroxylase-associated neurodegeneration

Explore actively recruiting Fatty acid hydroxylase-associated neurodegeneration studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Fatty acid hydroxylase-associated neurodegeneration with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Fatty acid hydroxylase-associated neurodegeneration studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

Get Signals for Fatty acid hydroxylase-associated neurodegeneration

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Fatty acid hydroxylase-associated neurodegeneration

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Fatty acid hydroxylase-associated neurodegeneration experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.