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Living with Polyostotic fibrous dysplasia of bone

A rare bone disease in which scar-like tissue replaces parts of more than one bone, sometimes with skin spots and hormone problems.

Understanding Polyostotic fibrous dysplasia of bone

Polyostotic fibrous dysplasia of bone is a rare bone disease in which scar-like (fibrous) tissue replaces more than one bone.

It can sometimes occur together with light brown skin spots (café-au-lait spots) and hormone problems, a combination known as McCune-Albright syndrome.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. It describes these features:

  • Scar-like tissue replacing parts of several bones
  • Light brown skin spots (in McCune-Albright syndrome)
  • Hormone problems (in McCune-Albright syndrome)

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 GNAS 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 Children's 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
Which bones are affected, and how will they be monitored?
Do I have signs of McCune-Albright syndrome, and should hormones be checked?
What treatments can help with bone pain or fractures?

Quick facts

GenesGNAS

Changes in the GNAS gene cause this condition.

Genetic

Also known as: osteitis fibrosa disseminata; pfd; pfd - polyostotic fibrous dysplasia; pofd - polyostotic fibrous dysplasia; polyostotic fibrous dysplasia

Patient organizations

Source: NIH GARD · Polyostotic fibrous dysplasia of boneGARD ID 4213 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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