M75: Shoulder lesions

M75.1: Rotator cuff syndrome

The shoulder has a muscle group made up of 4 muscles. The muscles begin to the front and rear of the shoulder blade. Tendons attach them to the humerus at the top. These muscles stabilize the shoulder joint and are involved in various arm movements.

If the muscle group gets damaged it can affect the muscles or your tendons. For example, the muscles or tendons may be partly or completely torn. It may also be that one or more of the tendons are inflamed or changed in some other way. Muscles and tendons in the muscle group can become damaged due to wear and tear or various disorders, for example.

When the shoulder muscle group is damaged it can be painful. The shoulder’s mobility can be affected. You may also have less strength than usual in your arm.