Diseases and Conditions

Fibrous dysplasia

Symptoms

Fibrous dysplasia may cause few or no signs and symptoms, particularly if the condition is mild. More severe fibrous dysplasia may cause:

  • Bone pain, usually a mild to moderate dull ache
  • Swelling
  • Bone deformity
  • Bone fractures, particularly in the arms or legs
  • Curvature of leg bones

Fibrous dysplasia can affect any bone in the body, but the most commonly affected bones include the following:

  • Thighbone (femur)
  • Shinbone (tibia)
  • Upper arm bone (humerus)
  • Skull
  • Ribs
  • Pelvis

Rarely, fibrous dysplasia may be associated with a syndrome that affects the hormone-producing glands of your endocrine system. These abnormalities may include:

  • Very early puberty
  • Overactive hormone production
  • Light brown spots on the skin

Increased bone pain also may be associated with the normal hormonal changes of the menstrual cycle or pregnancy.

When to see a doctor

See your doctor if you or your child develops any of the following:

  • Bone pain that increases with weight-bearing activity or doesn't go away with rest
  • Bone pain that interrupts sleep
  • Difficulty walking or limping
  • Unexplained swelling
  • Changes in bone shape
  • Difference in limb length