Fibrous dysplasia is a chronic disorder in which an abnormal development of fibrous tissue causes bones to expand. Any bone can be affected. More than one bone can be affected at any one time, and, when multiple bones are affected, it is not unusual for them to all be on one side of the body. However, fibrous dysplasia does not spread from one bone to another.
Osteogenesis imperfecta (OI) is an inherited (genetic) bone disorder that is present at birth. It is also known as brittle bone disease. A child born with OI may have soft bones that break (fracture) easily, bones that are not formed normally, and other problems. Signs and symptoms may range from mild to severe.
Osteomyelitis is an inflammation or swelling of bone tissue. It’s most often caused by an infection. A bone infection may occur for many reasons. It can affect children or adults.
Paget disease of the bone is a chronic bone disorder. It causes bones to become enlarged and deformed. Bone may become dense, but fragile, because of excessive breakdown and deformation of bone. The disease is the most common bone disorder after osteoporosis in people older than age 50.
Primary hyperparathyroidism is when one or more of the parathyroid glands makes too much parathyroid hormone. This can lead to bone tissue loss. Here's what you need to know.
Avascular necrosis develops when blood supply to a bone is cut off. This causes the bone to die and can cause pain and joint problems.