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Living with Craniofacial dyssynostosis

A rare condition in which some skull bones close too early, changing head shape and affecting development.

Understanding Craniofacial dyssynostosis

Craniofacial dyssynostosis is a rare skull condition in which certain skull seams close too early, changing the shape of the head.

The seams affected are both lambdoid sutures and the back of the sagittal suture. Features include a changed skull shape, a prominent forehead, low-set ears, and a flat middle face. Short stature, developmental delay, epilepsy, and trouble moving the eyes have been reported. Brain differences can include enlarged fluid spaces (hydrocephalus) and a missing corpus callosum. It starts at birth.

Signs & symptoms

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

  • Early closure of skull bones (craniosynostosis)
  • Prominent forehead
  • Larger head size (macrocephaly)
  • Extra fluid in the brain (hydrocephalus)
  • Severe global developmental delay
  • Short stature

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.

  4. Connect with expert centers

    World Craniofacial Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists)
Expert care
Expert lists: 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 FACES: The National Craniofacial Association 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 can we monitor pressure in the brain and skull?
Is surgery recommended for the skull seams?
Which specialists, such as neurosurgery and genetics, should be involved?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive

GARD says changes in genes cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent. GARD doesn't name a gene.

Genetic

Also known as: bilateral lambdoid and sagittal synostosis; blss; craniofacial dyssynostosis and short stature; craniofacial dyssynostosis with short stature; craniosynostosis-craniofacial dysostosis syndrome; isolated sagittal and bilambdoid craniosynostosis

Patient organizations

Source: NIH GARD · Craniofacial dyssynostosisGARD ID 1575 · 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 Craniofacial dyssynostosis.

Explore the Craniofacial dyssynostosis blog

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