Valgus - What Does This Mean in Osteoarthritis of the Knee?

'Valgus' is a term used by the medical profession to describe joints that form an angle different from the usual. It does not apply only to the knee. Valgus means that the part of the body furthest away from the torso is angled away from the midline position. In simple terms, if the knees are described as valgus, they are 'Knock-kneed.'

Valgus knees indicate that the arthritis is mainly on the outside of the knee. The wearing down of the cartilage lining on the outside of the knee has led to a change in the angle through the joint. The terminology a doctor would use would be to describe being knock-kneed as having a valgus deformity, or the latin phrase 'genu valgum.'

Doctors approximate the angle of deformity to assess the progression of the degenerative joint disease. Please note: there is natural variation between individuals, with some having a larger angle through the knee than others. The change in angle is the important factor.

When a knee becomes so painful that surgery is the only option, the good news is that in most cases the surgeon can correct any angulation. It is not uncommon for patients to have a straighter knee after their operation than they have had for years.

As is common in osteoarthritis, it is important not to focus too much on factors such as joint angle - after all it is just a measurement. Symptoms, particularly pain, generally take priority in the decision making process. It is wise to seek an expert opinion however, as on some occasions, large deformities make surgical intervention more difficult than usual.