One of the most common and most problematic knee injuries occurring in sport. Correct early diagnosis is important so that appropriate treatment may commence. Occurs mainly in sports such as football, handball, ice-hockey and downhill skiing.

Violent twisting -  the foot gets caught in something and the knee is twisted inwards.
Collisions in contact sports.
Violent hyperextension.

Symptoms
Immediate pain as the injury is sustained.
Difficulty in putting pressure on the injured joint.
Swelling in the knee due to bleeding and effusion.
A feeling of instability when pressure is put on the knee.
Impaired mobility and muscle function.

Treatment
Rehabilitation program with a physiotherapist, gradually increasing in intensity.
A brace to facilitate activity and rehabilitation.
Emergency attention, see a doctor for correct diagnosis and possibly an operation.