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Living with Craniodiaphyseal dysplasia, autosomal dominant

A rare genetic bone condition with heavy, thickened bones, especially in the skull and face, that can press on nerves.

Understanding Craniodiaphyseal dysplasia, autosomal dominant

Craniodiaphyseal dysplasia is a rare genetic bone condition with widespread thickening and hardening of bone, especially in the skull and face.

The bone growth can be so severe that it distorts the face, a look called leontiasis ossea. Over time, the openings in the skull and face where nerves pass narrow (stenosis), which can lead to serious nerve problems in childhood.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary mentions these:

  • Thick, hard bones, especially in the skull and face
  • Changes in the shape of the face
  • Narrowed openings for nerves in the skull
  • Nerve problems in childhood

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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 FACES: The National Craniofacial Association
  • 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
Would SOST gene testing help our family?
How often should the nerves, eyes, and hearing be checked?
What surgical or other treatments could relieve pressure on nerves?

Quick facts

It is caused by changes in the SOST gene, which makes a protein called sclerostin. GARD says it can be inherited in an autosomal dominant or recessive way.

Also known as: cdd

Patient organizations

Source: NIH GARD · Craniodiaphyseal dysplasia, autosomal dominantGARD ID 249 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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