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Living with Familial scaphocephaly syndrome, McGillivray type

A rare condition in which skull bones fuse too early, giving a long, narrow head, larger head size and a set-back upper jaw.

Understanding Familial scaphocephaly syndrome, McGillivray type

Familial scaphocephaly syndrome, McGillivray type is a rare form of craniosynostosis, in which skull bones fuse too early.

It causes a long and narrow head shape, a larger-than-usual head, and an upper jaw set back from normal. It can also cause mild intellectual disability. It is seen in newborns and infants.

Signs & symptoms

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

  • Long, narrow head
  • Larger head size (macrocephaly)
  • High forehead
  • Set-back midface and open bite
  • Wide-set eyes
  • Mild intellectual disability

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 and genetic specialists.

  3. Consider genetic testing

    Changes in FGFR2 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

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

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists); 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 World Craniofacial Foundation 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
Is surgery to release the skull bones an option?
Should we have genetic testing for the FGFR2 gene?
Which specialists should follow my child's development and jaw?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant
GenesFGFR2

Changes in the FGFR2 gene cause it. It is autosomal dominant, which means one changed copy of the gene is enough.

GeneticNeurological

Also known as: scaphocephaly-macrocephaly-maxillary retrusion-intellectual disability syndrome; scaphocephaly, maxillary retrusion, and impaired intellectual development

Patient organizations

Source: NIH GARD · Familial scaphocephaly syndrome, McGillivray typeGARD ID 3426 · 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 Familial scaphocephaly syndrome, McGillivray type.

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