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Living with Neurodevelopmental disorder with progressive spasticity and brain white matter abnormalities

A rare genetic condition with muscle stiffness that slowly worsens, mainly in the legs, and changes in the brain's white matter.

Understanding Neurodevelopmental disorder with progressive spasticity and brain white matter abnormalities

Neurodevelopmental disorder with progressive spasticity and brain white matter abnormalities is a rare genetic nervous system condition of variable severity.

It causes stiffness that slowly gets worse, mostly in the legs. Most people have developmental delay, moderate to severe intellectual disability, and white matter changes in infancy. Seizures, breathing episodes needing support, tight joints, and eye problems can occur. Some have normal early development until later childhood, followed by loss of skills. Some have only spastic paraplegia (leg stiffness).

Signs & symptoms

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

  • Leg stiffness (spastic paraplegia)
  • Delayed development
  • Loss of skills (developmental regression)
  • Seizures
  • Small head (microcephaly)
  • Vision problems

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 HPDL 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 United Cerebral Palsy
  • 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 HPDL gene?
Which treatments can help with stiffness and tight joints?
How should breathing and seizures be monitored?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesHPDL

GARD lists changes in the HPDL gene. A child inherits a changed copy of the gene from each parent (autosomal recessive).

GeneticNeurological

Also known as: cerebral palsy, spastic quadriplegic, 1; cerebral palsy, spastic quadriplegic, type 1; infantile neurodegeneration-progressive spasticity-intellectual disability-white matter lesions syndrome; nedswma

Patient organizations

  • United Cerebral PalsyNeurodevelopmental disorder with progressive spasticity and brain white matter abnormalities · United States
Source: NIH GARD · Neurodevelopmental disorder with progressive spasticity and brain white matter abnormalitiesGARD ID 10447 · 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 Neurodevelopmental disorder with progressive spasticity and brain white matter abnormalities.

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