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Living with Hereditary spastic paraplegia 37

A pure type of hereditary spastic paraplegia with slowly worsening leg stiffness, starting at any age from childhood.

Understanding Hereditary spastic paraplegia 37

Hereditary spastic paraplegia 37 is a pure form of hereditary spastic paraplegia with slowly worsening stiffness in the legs.

It brings a spastic walk, brisk reflexes in the arms and legs, reduced vibration sense at the ankles, and bladder problems. Some people have ankle clonus (rhythmic jerking of the ankle). It can start at any time from childhood.

Signs & symptoms

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

  • Stiff legs (spasticity)
  • Leg weakness
  • Brisk reflexes
  • Reduced vibration sense in the legs
  • Spastic walk
  • Ankle clonus, in some people

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 KPNA3 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); 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 Spastic Paraplegia 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 genetic testing for the KPNA3 gene confirm the diagnosis?
How can bladder problems be managed?
Which therapies help with stiffness and walking?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Dominant
GenesKPNA3

It is caused by changes in the KPNA3 gene. It is autosomal dominant, so one changed copy of the gene is enough.

GeneticNeurological

Also known as: autosomal dominant spastic paraplegia 37; autosomal dominant spastic paraplegia type 37; hereditary spastic paraplegia type 37; spastic paraplegia 37, autosomal dominant; spg37

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Hereditary spastic paraplegia 37GARD ID 17064 · 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 Hereditary spastic paraplegia 37.

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