Bone spurs, or osteophytes, result when bone formation occurs beyond the regular limits of the skeletal system. These micro-regions are characterized by an accumulation of calcium, and are usually associated with stress or inflammation in the major joints of the body. Bone spurs are most prevalent in the neck, shoulders, spine, knees, and feet, but can be found in other areas as well. The development of a bone spur is fairly common after age 60, and is often, though not always, accompanied by pain or tenderness in the affected joint. Joints represent the intersection of bone, muscle, ligaments, and tendons, and are thus susceptible to injury from any of these sources. Often, such physical injuries or inflammation have the secondary effect of spur formation. In particular, there is a very striking relationship between occurrence of arthritis, which is essentially an inflammatory disease, and osteophytosis (spur development) in the problematic joint.
Spurs may gradually grow on the upper part of the shoulder blade, called the acromion. Physical trauma and pre-existing conditions such as tendonitis or impingement are often associated with shoulder spurs. Misalignment of the shoulder blade can irritate local ligaments, and the resulting spur causes moderate to severe pain, depending on the arm’s position.
Causes and Risk Factors
Causes
- Pre-existing condition, such as impingement or tendonitis.
- Overuse
- Muscle weakness
Risk Factors
- Athletes who perform frequent overhead motions, such as water polo and basketball players
- Overuse of the shoulder by repeated throwing or overhead exercise
Last updated: Jan-01-00
