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Living with Morquio syndrome

An inherited condition (MPS IV) that mainly affects the skeleton, causing short stature, joint and spine differences, and cloudy corneas.

Understanding Morquio syndrome

Morquio syndrome, also called mucopolysaccharidosis type IV (MPS IV), is a progressive inherited condition that mainly affects the skeleton.

The first signs usually appear in early childhood, and the rate of change varies. People develop short stature, knock knees, and differences in the ribs, chest, spine, hips, and wrists. A peg-like bone in the neck (odontoid process) is underdeveloped, which can misalign the neck bones and press on the spinal cord. The cornea often becomes cloudy, and some have ear infections, hearing loss, and a narrow airway.

Signs & symptoms

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

  • Short stature and knock knees
  • Rib, chest, and spine differences
  • Very flexible joints
  • Cloudy corneas (corneal opacity)
  • Hearing impairment
  • Dental problems, such as thin enamel and cavities

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, 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.

  4. Connect with expert centers

    Little People of America and World Craniofacial Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Eye disease specialists (ophthalmologists); Genetic specialists (geneticists)
Expert care
Expert lists: Little People of America, World Craniofacial 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 Little People of America 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
How is the neck bone (odontoid) checked for spinal cord pressure?
Which specialists should follow bones, eyes, hearing, and breathing?
Can genetic testing confirm which type of MPS IV this is?

Quick facts

Symptoms usually startInfant and as a Child
InheritanceAutosomal Recessive

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

GeneticInherited MetabolicLysosomal Storage

Also known as: atypical chondrodystrophy; brailsford-morquio syndrome; chondro-osteodystrophy; chondrodystrophia tarda; deficiency of chondroitinsulphatase; eccentro-osteochondrodysplasia

Patient organizations

Source: NIH GARD · Morquio syndromeGARD ID 12562 · 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 Morquio syndrome.

Explore the Morquio syndrome blog

Explore research for Morquio syndrome

Explore actively recruiting Morquio syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Morquio syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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