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Definition
By Mayo Clinic staffFibrous dysplasia is a bone disorder in which scar-like (fibrous) tissue develops in place of normal bone. As the bone grows, the softer, fibrous tissue expands, weakening the bone. Fibrous dysplasia can cause the affected bone to deform and become brittle.
Mild cases of fibrous dysplasia usually cause no signs or symptoms. More serious cases may result in bone pain and deformity, which usually develop before age 15.
The cause of fibrous dysplasia is unknown. There's no cure for fibrous dysplasia, and treatment focuses on relieving signs and symptoms.
Symptoms
