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Living with Mesomelia-synostoses syndrome

A rare inherited bone condition with short middle sections of the limbs, fused bones, and facial and palate differences.

Understanding Mesomelia-synostoses syndrome

Mesomelia-synostoses syndrome is a rare bone and joint condition with progressive shortening of the middle parts of the limbs and fused bones.

People have a distinct facial look and differences of the soft palate. Bones in the arms, legs, hands, and feet may be fused. It starts in pregnancy, at birth, or in infancy.

Signs & symptoms

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

  • Short middle sections of the arms and legs (mesomelia)
  • Fused bones in the hands and feet
  • Fused wrist bones
  • Joint stiffness
  • Drooping upper eyelids (ptosis)
  • High, narrow palate

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 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); 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 Chromosome Disorder Outreach
  • 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
Is genetic testing available for this condition?
How should joint stiffness and limb growth be monitored?
Which specialists should follow bones and the palate?

Quick facts

Symptoms usually startduring Pregnancy, at Birth, and as an Infant
InheritanceAutosomal Dominant

Changes in genes (also called variants) cause this condition. It is inherited in an autosomal dominant way, so a change in one copy of the gene can be enough.

Genetic

Also known as: 8q13 microdeletion syndrome; chromosome 8q13 deletion syndrome; del(8)q(13); mesomelia synostoses syndrome verloes david pfeiffer type; mesomelia-synostoses syndrome, verloes-david-pfeiffer type; mesomelic dysplasia with acral synostoses verloes david pfeiffer type

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Mesomelia-synostoses syndromeGARD ID 4302 · 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 Mesomelia-synostoses syndrome.

Explore the Mesomelia-synostoses syndrome blog

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Explore actively recruiting Mesomelia-synostoses syndrome studies with HealthSpark.

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