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Living with Horizontal gaze palsy with progressive scoliosis

A genetic condition that affects side-to-side eye movement from birth and causes a curved spine that gets worse over time.

Understanding Horizontal gaze palsy with progressive scoliosis

Horizontal gaze palsy with progressive scoliosis (HGPPS) is a genetic condition that affects the eyes and the spine.

People cannot move their eyes side to side from birth, so they turn their head to follow objects. Up-and-down eye movement is typically normal. Scoliosis develops between infancy and childhood and tends to worsen. It can be painful, and may need bracing or surgery. Brain imaging shows differences along the midline. Most people have normal intelligence, but mild intellectual disability can occur.

Signs & symptoms

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

  • Cannot move eyes side to side
  • Curved spine (scoliosis)
  • Rounded upper back (kyphosis)
  • Crossed eyes (strabismus)
  • Fast, shaky eye movements (nystagmus)
  • Low muscle tone (hypotonia)

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 bone and joint specialists, brain and nervous system specialists, eye disease 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
Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists); Eye disease specialists (ophthalmologists); 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 rare disease patient organizations for support
  • 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
How often should the spine be checked for scoliosis?
When might bracing or surgery be considered?
Would genetic testing help our family?

Quick facts

Symptoms usually startChild and as a Teenager
InheritanceAutosomal Recessive

Changes in genes (also called variants) cause this condition. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

GeneticNeurological

Also known as: familial infantile scoliosis associated with bilateral paralysis of conjugate gaze; gaze palsy, familial horizontal, with progressive scoliosis; hgpps; hgpps - horizontal gaze palsy with progressive scoliosis; progressive external ophthalmoplegia and scoliosis

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Horizontal gaze palsy with progressive scoliosisGARD ID 12682 · 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 Horizontal gaze palsy with progressive scoliosis.

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