Shoulder problems - the acromio clavicular joint
This joint is a simple joint sited where the collar bone, or clavicle, forms a joint with the outer end of the shoulder blade, or acromion. This joint is vulnerable to strain and full or partial dislocation during falls. Rugby players are particularly vulnerable to this problem Footballers and hockey players too. Falls in icy conditions are also a cause.
A partial dislocation, or subluxation, is often seen as a lump on the top of the shoulder. It can be seen in the mirror when comparing with the other side.
X-rays can be useful in diagnosing the extent of damage. Physiotherapy and local steroid injections are commonly used in treatment but severe damage may require surgical intervention.