What is it?
Glenohumeral arthritis is arthritis that involves the shoulder joint. It is a result of the progressive loss of the joint's protective lining of the joint (cartilage). This is best seen on an X-ray as a loss of the space between the cup(Glenoid) and the ball(humeral head) (Fig 1).
This arthritis presents with pain and loss of movement in the shoulder which is often worse at night.
What is the cause?
Often no cause is found, it is just put down to wear and tear! it can however be caused by previous trauma,over use of the shoulder, and inflammatory conditions such as rheumatoid arthritis, to name but a few.
What is the treatment?
Initial treatment in patients with minimal or intermittent pain is usually simple analgesics and in some cases a steroid injection.
In patients with severe pain, particularly at night, a joint replacement is often recommended (fig 2)