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Living with Osteocraniostenosis

A rare skeletal condition with a cloverleaf-shaped skull, facial differences, short limbs, and thin bones.

Understanding Osteocraniostenosis

Osteocraniostenosis is a rare skeletal condition with a cloverleaf-shaped skull, facial differences, and short limbs.

Features also include a small or missing spleen and X-ray differences, such as thin long bones with flared ends and a skull that is not fully mineralized. GARD lists onset as during pregnancy and as a newborn.

Signs & symptoms

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

  • Extra fluid in the brain (hydrocephalus)
  • Delayed development overall
  • Short stature
  • Small penis (micropenis)
  • Small or missing spleen
  • Thin skull bone formation

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. Consider genetic testing

    Changes in FAM111A are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

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 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
Which specialists should be part of the care team?
How should hydrocephalus be monitored?
Would FAM111A genetic testing help our family?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Dominant
GenesFAM111A

Changes in the FAM111A gene cause this condition. It is inherited in an autosomal dominant way, meaning one changed copy of the gene can be enough.

Genetic

Also known as: gcleb; gracile bone dysplasia; habrodysplasia; osteocraniosplenic syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · OsteocraniostenosisGARD ID 3396 · 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 Osteocraniostenosis.

Explore the Osteocraniostenosis blog

Explore research for Osteocraniostenosis

Explore actively recruiting Osteocraniostenosis studies with HealthSpark.

HealthSpark

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

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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