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Living with Spinal muscular atrophy-Dandy-Walker malformation-cataracts syndrome

A rare nervous system condition with cataracts, a brain difference, and muscle weakness in the legs that begins in childhood.

Understanding Spinal muscular atrophy-Dandy-Walker malformation-cataracts syndrome

Spinal muscular atrophy-Dandy-Walker malformation-cataracts syndrome is a rare neurologic disease with cataracts, a Dandy-Walker brain malformation and distal spinal muscular atrophy.

People have cataracts in both eyes and a Dandy-Walker malformation, a difference in the back of the brain. In childhood, weakness and muscle wasting slowly worsen, mostly in the lower legs and less in the arms. Reflexes are reduced. Onset is in the newborn and infant period.

Signs & symptoms

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

  • Cataracts (clouded lenses)
  • Dandy-Walker malformation
  • Weakness in the outer limbs
  • Wasting of lower leg muscles
  • Small cerebellar vermis
  • Reduced reflexes

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. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

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 Dandy-Walker Alliance, Inc.
  • 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
Can genetic testing help find the cause?
How often should the eyes and brain be checked?
What therapies can help with leg weakness?

Quick facts

Symptoms usually startNewborn and as an Infant

GARD says changes in genes cause this condition, but it doesn't list a gene or how it is inherited.

GeneticNeurological

Also known as: spinal muscular atrophy, dandy-walker malformation, cataract syndrome

Patient organizations

Source: NIH GARD · Spinal muscular atrophy-Dandy-Walker malformation-cataracts syndromeGARD ID 18922 · 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 Spinal muscular atrophy-Dandy-Walker malformation-cataracts syndrome.

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