M24.02: Loose body in joint Upper arm

You have loose bodies in one or more joints in your elbow.

3 bones meet at the elbow. These are the humerus and the two bones in the forearm. These are called the ulna and the radius. In the elbow there are several joints between these 3 bones. This is how we are not only able to bend and stretch the arm, but also able to twist the forearm, for example when driving in a screw.

In a joint, two or more bones come together. The bones are coated with a protective layer of cartilage. And joints are also encased in a capsule made of connective tissue. Inside the capsule there is always some fluid in the joint. It can happen, for various reasons, that a piece of bone, cartilage or connective tissue becomes detached. This piece can then move freely in the fluid in the joint. Reasons may include, for example, injuries or inflammation of the joint. After an operation, suture material may become detached so that it moves freely within the fluid in the joint. When something is moving freely within the joint, it is known as a loose body.

If loose bodies get jammed in the joint, it can cause pain. It may also no longer be possible to move the joint properly. The joint may then swell up.