High Quality Content by WIKIPEDIA articles! In orthopedics, a valgus deformity is a term for the outward angulation of the distal segment of a bone or joint. The opposite of valgus is called varus. The terms varus and valgus always refer to the direction that the distal segment of the joint points. For a discussion of the etymology of these words, see the entry under varus. Common causes of Valgus Knee in adults include Knee arthritis and post traumatic. Knee Arthritis with Valgus Knee